Adding QT libraries with Environment variables.

Project requires 4 environment variables to be set

OPENCV_INCLUDE (Something like C:\OpenCV\build\include)
OPENCV_LIB (Something like C:\opencv\build\x86\vc10\lib)
QT_INCLUDE (Something like C:\Qt\Qt5.2.1\5.2.1\msvc2010\include)
QT_LIB (Something like C:\Qt\Qt5.2.1\5.2.1\msvc2010\lib)