Zooming anchor moved to scene center
Increased sensor region for more convenient touch dragging;
Disabled 2D model reinitialization when active tab changes to non-diagram one
Merge pull request #1202 from dvvrd/touch

Zooming anchor moved to scene center
Merge pull request #1203 from dvvrd/robots

2D model fixes for geek picnic
some unfinished code related to sensor settings synchronization
fixed bug with groups creation
Sensors configuration is now synchronized properly
added .txt to gitignore to stop spamming with usability statistics
Merge branch 'master' of https://github.com/qreal/qreal into sensors-synchronization

Conflicts:
	plugins/robots/robotsInterpreter/details/d2RobotModel/d2ModelWidget.cpp
Fixed too frequent sdf files re-reading
fixed styleguide
Merge pull request #1204 from qreal/sensors-synchronization

Sensors synchronization + Some optimizations for sdf-based icons
Merge branch 'master' of https://github.com/qreal/qreal into editorPluginTestTool