made include paths in qrgui begin from a project root folder
second stage of include paths refactoring, finished qrgui and qrxc
restored build
linux build
Fixed #1013
Merge pull request #1019 from dvvrd/robots

Fixed #1013
Fixed #1006
Merge pull request #1012 from qreal/includePaths

Include paths
Small refactoring for scene grids
Fixed grid initialization in 2D model
GridParemeters moved to namespace
Temp fix for untranslatable 'Show grid'
Restored spaces in 2d model .ui file
Merge branch 'master' of github.com:qreal/qreal into robots

Conflicts:
	qrgui/view/editorViewScene.h
Added forgotten includes
Fixed #1022
Merge pull request #1025 from dvvrd/fix1022

Fixed #1022
Merge pull request #1021 from dvvrd/robots

Fixed #1006
Merge branch 'master' of github.com:qreal/qreal into fix1017
Removed reference ownership comments