Update qt5 porting
Merge branch 'master' of https://github.com/lxde/liblxqt into qt5

Conflicts:
	CMakeLists.txt
	cmake/lxqt-config.cmake.in
Fix after merging from master, by removing dupplicated items
Fix internal include
Detect the path of qmake correctly for Qt5.
Use newer version of cmake 2.8.9