path fix in .pro, added possible edges in metamodel
New version of square links mode
added new edges ends: crossed line and empty circle
recommit
Merge branch 'master' of https://github.com/Ashatta/qreal into checker

Conflicts:
	plugins/bpmn/bPMNMetamodel.pro
First some rules implemented in rulesChecker plugin
bug with dehighlight in qrgui! (Issue #859)