Since Rob has committed his precipitation spatial interpolation, the 2D_interpolation reference result had to be updated. Several members in filter classes could be made const/static/private.

Some "TODO" have been removed, a missing check has been added in Interpol1D:linRegression (at least 2 valid points are required), type inconsistencies have been fixed in FilterTukey and ProcessinStack. However using size_t for the meteo parameter index is not necessarily a good idea and this will require a careful review.

Removing some unnecessary pointers (for things like "const double a = vecM[ii](param)") and replacing a vector push_back by a proper allocation in constructor followed by assignments

Lots of vectors copies were made using push_back(). This is definitely not efficient! This has been replaced by vec_o = vec_i, we will see which impact it has on performances...

fixing some of the warnings found on Hera (sorry for not noticing before). All the size_t / unsigned int stuff will have to be addressed later

Lots of small fixes after running cppcheck on Windows: unused variables, use ++i instead of i++ for complex types (ie mostly iterators for us) for more performance, a few variables that could be passed as const&, use vector.empty() instead of vector.size==0 (for clarity and potentially performances).

On osx too, the exceptions can now produce a message box. Several warnings have been fixed (mostly signed/unisgned issues)

New warnings have been tried to detect variable shadowing (one variable declared with the same name as another one), alignement issues, etc. This produces very verbose output (not all warnings are legitimate) but allowed to fix lots of cases of misalignement and shadowing issues. These options have been left in the CMakeLists but NOT enabled (since these warnings are not so easy to interpret).

The last filters that had not been ported to the new filtering infrastructure have been ported and their documentation updated. All filters now use window specifications (instead of vector of pointers). The misleading filter argument "index" (for parameter type) has been renamed as "param" for all filters. The use of "unsigned int" for looping over vectors has been replaced by "size_t". The old "soft" behavior for the filters has been restored (ie: if not soft, a point that can not be checked by the filter is deleted).

A few more "consts" have been added.

All the filters using windows have been modified so they use the window specifications (start, end) instead of a vector of pointers. The FilterWindAvg was not properly handling nodata, this has been fixed. By the way, when using a reasonnably large buffer size, the new filter window management is actually slightly faster than the old one (1%). 

The handling of "soft" is now different: soft ONLY applies to the window specifications. Before, a soft filter would leave values that could not get a window untouched while non-soft would force them to nodata. Now, all values that can not get a window are left unchanged, while the window centering can change according to "soft".

Another fix/enhancement for POPC: the libraries now ends with "popc" in the popc version, as the autotools build was doing.

Windchill and heat index have been implemented in Atmosphere.

Some cleanup in the filters, some code moved to ProcessingBlock, so that elements that are not filters can inherit ProcessingBlock and get all that it needs. A processing element has been implemented to multiply by a given constant, another one to add a given offset and another one to correct precipitation for undercatch.

Some invalid doxygen comments have been fixed in MathOptim.

The "soft" argument was not properly handled by the Min and Max filters, this has been fixed. All filters now properly reserve the vector size that they need, which reduces the number of instruction fetch misses and should (slightly) improved performances. Please try to use vector.reserve() whenever possible!

Performance boost: Redesign of class MeteoData. The individual public double members like tss, ta, rh have been removed and instead of the rather complicated internal representation with the help of std::map and pointers, the MeteoData object now holds all its important information in one double vector (meteo data) and one string vector (parameter names). Thus the overloaded copy constructor could be slashed radically. This leads to huge performance gains, especially when dealing with huge vectors of MeteoData (which are needed for filtering, resampling, etc).

Furthermore the access to the meteo parameters has been simpleified by overloading the operator(), replacing the old .param(size_t index) and .param(string paramname) functions:

MeteoData md;
double ta = md(MeteoData::TA);

OR

double ta = md("TA");

These changes were propagated into all of MeteoIO.

Fixing some unsigned int / size_t conversion issues by using more widely size_t (as it seems to be recommended and done in the STL)

A bug has been found in the processing of the variance: we were using a naive formula that is ill-fitted to signals showing small variations around a large mean. This lead to catastrophic cancellation and negative values... This has been replaced by a (slower) compensated formula (that works in two passes). The standard deviation filter has been fixed. 

The Tukey filter has been brought back into the new infrastructure and should now be usable. However it is not suitable to snow heights: in such a case, the standard deviation is too small (or even zero) and the signal might show some sudden variations (like in the case of a snow fall) that would therefore be falsely rejected. This filter seems much better suited to wind speeds that exhibit some constant background noise, thus a non-null standard deviation.

The rate filter can now take 2 arguments: in such a case, the first one is the minimum rate and the second the maximum rate. This would allow to define a descent rate different from the climb rate.

Several error messages have been improved in A3DIO and general plugin loading.

Finally, two small tools for working with smet files have been contributed, one allowing transparent loading of smet files in xmgrace (smet2agr). And the example io.ini has been fixed (it had been broken and was not working with the examples anymore)