generateArrow now gets logical edge to find explosion, which is right now correct way to find it.
crude way of iteration thru diagram implemented
template renames
arrow generation of codearea and endstate blocks
Merge branch 'widget' of https://github.com/efim/qreal into widgetWOEditor

Conflicts:
	plugins/guiEditor/guiEditorMetamodel/guiEditorMetamodel.pro