[Core, Data] Comments
[Importer, Layout] Comments
[Manager, Model] Comments
[Noise, OsgQtBrowser, QOSG] - original OSG classes, no commenting is needed
Final version
Merge pull request #1 from iplesko/plesko

Merging with I.Plesko's collaborative features
Added more .gitignore patterns
Fixed building of qtcolorpicker on newer Qt
Removed obsolete igraph, libpng, zlib, _Windows/ dependencies, build cleanup.
merged zelers work
fixed compile errors after merge
merged Sivaks work with already merged zelers and pleskos work
fixed compile errors after merge
cleanup
Removed obsolete lib/libpng.lib
Fix to compile qtcolorpicker
Brndiarova's project
merged Gabika brndiarova branch
.gitignore update
Build update - added 'cotire' CMake module to speed up build