for rustam with love
Add enum describing type of line and fixed some indentation.
Loop edges implementation added.
Merge branch 'feature' of https://github.com/VladimirGl/qreal into feature
Loop connection to one port impelmentation.
Merge branch 'feature' of https://github.com/VladimirGl/qreal into feature
Added some comments. Code become more styleguided.
Edge settings moved to the editor page.
Fixed bugs with loop edges on the linear ports.
conflict's fixed.
Renamed some enums.
some translations.
Merge branch 'feature' of https://github.com/rustam-azimov/qreal into feature
Added groups in block diagrams. Fixed linker.
styleguide fixes
changed SquareLine and CurveLine config variables to single LineType
Merge branch 'master' of https://github.com/qreal/qreal into feature

Conflicts:
	qrgui/dialogs/preferencesPages/miscellaniousPage.cpp
	qrgui/qrgui_ru.qm
	qrgui/qrgui_ru.ts
fixed translations