Total export of fontconfig API.

Really few functions are missing.
Starting investigation of fontconfig under Windows (I have a little issue with loading of configuration)
Fix : MonoD solution
[Windows] Fix fontconfig initialization
[Font] Fix font file search result when it depends of style
Merge branch 'windows_fontconfig'
[Font/TextItem] Fix bad naming between family and style
[Font] Implement string[]	getSystemFonts() with fontconfig
Merge pull request #66 from Flamaros/master

[Font/TextItem] Improve fontconfig integration