Added forks generation for TRIK
Fixed scene wheel scroll behaviour when grid is disabled;
Scene optimized a lot (removed full redrawing on mouse events)
Added edge element selection even on accidental click on its label
Fixed grid time-to-time distortion when scrolling scene by mouse wheel
Added system variables rolling in print text block
Fixed print text block containing line breaks generation
Merge pull request #1324 from dvvrd/robots

Bugfixes and optimizations pack
Merge pull request #1323 from dvvrd/forks

QtScript forks generation
A blind attempt to add parsing of incomming messages from TrikRuntime
Removed constant re-connecting to TRIK device
Merge branch 'qts-errors' of git://github.com/dvvrd/qreal
Grammar fixes
Merge branch 'master' of github.com:qreal/qreal into switch
Fixed old-styled port names in generator compatibility mode
Added building of switch semantic tree in the readable case