Pre-alpha release

This release contains basic functionality:

• Drawing all base Class Diagram elements
• Saving/loading project
• Database of most popular STL classes and all Qt classes
• Simple abilities to edit classes methods and fields
• Preserving user's settings

There are also some functionality which are already implemented, but aren't exposed in the UI:

• Code generation
• Qmake pro-files generation
• Auto-adding fields and members on relation creating

They are comming soon.