Restore.
Merge branch 'master' of https://github.com/qreal/qreal into metamodelingOnFly

Conflicts:
	qrgui/pluginManager/editorManager.h
	qrgui/pluginManager/interpreterEditorManager.h
	qrgui/pluginManager/proxyEditorManager.h
	qrgui/qrgui_ru.qm
	qrgui/qrgui_ru.ts
	qrgui/view/private/exploserView.cpp
	qrgui/view/private/exploserView.h
Hidden properties removing.
setting default value for association from empty string to "no_arrow" since latter is the default value for it in gui
fixed metamodel opening.
generation of graphical model when saving interpretable metamodel
Merge branch 'master' of https://github.com/qreal/qreal into metamodeling-sk

Conflicts:
	qrgui/qrgui_ru.ts
Merge pull request #1231 from efim/master

setting default value for association
metaeditor only build
Merge branch 'master' of https://github.com/qreal/qreal into metamodeling-sk
fixed editor path on windows
trying to auto layout metamodel elements on saving interpretable metamodel
Merge branch 'metamodeling-sk' of github.com:qreal/qreal into metamodeling-sk
setting debug or release build configuration in metamodel
Merge branch 'metamodeling-sk' of https://github.com/qreal/qreal into metamodeling-sk
fixed crash when creating interpreted metamodel with generated plugin already loaded
made palette combo box reappear after editir generration
made start widget less ugly
made default shape in metamodeling on fly less ugly
Edges are now loaded after nodes, so that they can be attached to ports correctly