Now specifying validation="coordinates" validates the string against a
fixed coordinates regex and either prints the warning sign or a globe.

Added new ENABLE_XXX_FILTERING keys, code factorization in 1dinterpolations and new option for decimal dates in CSV plugin

(also showcase it in the temporary test XML)

It seems virtually impossible to collect all <section> tags from the XML
to re-build here without recreating the better part of the recursion
process, in effect doubling Inishell's core.
Hence, it is now a restriction that dynamic INI sections must go in a
dedicated <section> tag (as has always been supported) and can not be
scattered accross multiple stand-alone elements.

Exclude ';' from coordinates input (as this is a marker for comments, it can not appear in an ini file with another meaning)

Such plugins are now italicized so the user has a way to know they might
not work on his/her system.

Now there is a link to the online documentation

The WSL_HACK of the ARGOS plugin is defined in the metafile, not in the
ini file!

The configuration for MeteoIO's Argos plugin has been added

This is necesary for the packaging (it is much beter to have an
"inishell-apps" folder in /usr/share than an "applications" folder)

The goal being to avoid writing out lots of keys that already have
defaults in their respective applications

Also fixed a wrongly defined boldface in the terminalview and an invalid
icon format in the .desktop file

Of course, this means that "performant=true" must be replaced by
"pre-generate=false" for the same behavior.

It is not perfect in the sense that the 2DInterpolation section must be created anyway, independently of the use of spatial resampling or not. The same applies to the Grids2D configuration frame. A message is shown to the user, explaining when these should be used...

'Alternative' panels. Better error messages.

Now for nodes where we know that the performance saving workaround
makes sense, we can explicitly set it in the attributes. By default,
all children are built. Result: E. g. GEO_HEAT will be filled correctly
even if it's not used because SNP_SOIL is FALSE (without having to state
that it should work in the XML).

Offer the CSV plugin's mechanism to handle individual specifications for individual stations (thus also reading such INI files correctly)

The XML files had inconsistent case for the section names, this has been fixed. A mis-indenting has been fixed in help_dev.xml

But still lots more to do!