The constructor Coords(ConfigReader) was a bad idea... Convenient, but way too specific. It has been removed. The documentation in the Coords class has been updated.

A saner handling of nodata values by the plugins has been implemented. Now, each plugin should properly get its own internal definition of nodata and return data using IOUtils::nodata to the caller. A new method has been implemented in IOUtils to help cleaning a parameter for nodata.

A check for xmlParseFile (used for compiling the Boschung plugin) was working poorly and has been commented out in configure.ac.

Finally, more cleanup in the ph files has been performed.