Horrible watch window replaced with ok one;
Fixed segfault when changing sensor type;
Fixed first run sensor inactivity
Fixed fault when disconnecting during interpretation
Start dialog centers on window again;
Linker moved to the left and text disabled;
Scene zooms with ctrl + wheel now, just wheel scrolls the scene
Added some shortcuts;
Added some notes in changelog
Added space bar hand scene drag
Installer builder modified to qt5;
Version increased to 2.1.0;
Fixed some build warnings
Nxt tools installer synchronized with common one;
Some cosmetic fixes in examples
Some modifications in changelog;
Added automated robots installers builder
Merge pull request #665 from dvvrd/robots

QReal:Robots 2.1.0
Merge branch 'master' of github.com:qreal/qreal into undoredo
Partially implemented element groups undo redo