New version of square links mode
whitespace fix
Merge branch 'master' of https://github.com/qreal/qreal into square_links

Conflicts:
	qrgui/umllib/edgeElement.cpp
fixed problem with travis build
qrgui_unittests now is generated
qrxc_unittests is now generated
Merge pull request #857 from qreal/qreal-travisbuild

fixed problem with travis build
Merge pull request #856 from Ashatta/square_links

Square links
support of multiple references property
style fix
Merge remote-tracking branch 'trunc/master'
style fix
Merge pull request #860 from Ashatta/reference_lists

Reference lists
run button, documentation changes
Merge remote-tracking branch 'trunc/master'