added version check
added requiredVersion.h
Added updates checker plugin to installer;
Fixed robots-nxt-russian-c-generator lib packing
Merge branch 'fsharp-generator' of https://github.com/qreal/qreal
Merge branch 'master' of https://github.com/qreal/qreal
Made reinstalling previous versions of applications instead of forbidding installing into their directories
Walls now have normal behaviour when changing grid
Walls now have normal behavior when changing grid
fixed
fixed
fixed 'versions'
Merge branch 'master' of https://github.com/qreal/qreal into versions

Conflicts:
	plugins/robots/utils/include/utils/tcpRobotCommunicator.h
	plugins/robots/utils/src/tcpRobotCommunicator.cpp
added translation lines into utils/utils_ru.ts
Fixed segfault when fork starts with a node with non-simple semantics
correctly alligned walls
Fixed nxt color sensor work in 2D model
Restored correct subprograms generation
fixed some bugs in 2d model
Merge pull request #1388 from dima6120/many_robots

fixed some bugs in 2d model
Added some crappy hacks for translating target directory page into russian