removed obsolete plugins
added qreal.pro and qrealBP.pro to travis build script
Merge branch 'cleanUp' of https://github.com/qreal/qreal

Conflicts:
	plugins/plugins.pro
uncommented some more plugins
Merge branch 'master' of https://github.com/qreal/qreal
Merge branch 'feature' of https://github.com/IrinaShkviro/qreal
minor fixes
added translation
Fixed bug with loop line, which connected to line port.
More styleGuide.
Fixed bug with adding items on container.
Some refactoring.
Undo/Redo for arrow keys.
Merge pull request #888 from VladimirGl/bugfix

Исправлен баг с добавлением итема в контейнер, использую меню линка от элемента, лежащего внутри того-же контейнера.
Merge pull request #889 from VladimirGl/arrowKeyFix

Arrow key fix
Merge branch 'Resize' of https://github.com/IrinaShkviro/qreal
fixed translations
Merge branch 'master' of github.com:qreal/qreal
Merge branch 'bugFix' of github.com:rustam-azimov/qreal
minor optimization fixes