[DF-768] add methods to UIMetadata
[DF-768] Fix ui block size
[DF-768] implement stretching
Merge remote-tracking branch 'dava/development' into DF-768_StretchCaps
[DF-768] mac os fix
Merge remote-tracking branch 'dava/development' into DF-762_Modification

Conflicts:
	Projects/MacOSFramework/Framework.xcodeproj/project.pbxproj
[DF-762] add modification as int
[DF-792] is fixed.
[DF-762] comboBox variant
[DF-791] issue is fixed.
Merge remote-tracking branch 'DAVA/development' into UIEditor
[DF-712] Fix: partial rename
[DF-308] Removed libpng dependency from PngImageExt class
[DF-712] Fix: all needed files renamed/removed, Windows project fixed
[DF-185] Fixed compilation error
Merge branch 'development' of https://github.com/dava/dava.framework into development
Merge pull request #121 from adebt/UIEditor

[DF-792] is fixed.
Merge pull request #123 from adebt/DF-762_Modification

[DF-762] spriteModification(Reflection)
[DF-185] Fixed release configuration of UIEditor project file
[DF-813] Fixed UIStaticText::Clone. + const methods