Revision control
++ HEADERS += \
++ $$PWD/qssgrenderbuffermanager_p.h \
++ $$PWD/qssgrenderloadedtexture_p.h \
++ $$PWD/qssgrenderresourcemanager_p.h \
++ $$PWD/qssgrendershaderlibrarymanager_p.h
++
++ SOURCES += \
++ $$PWD/qssgrenderbuffermanager.cpp \
++ $$PWD/qssgrenderloadedtexture.cpp \
++ $$PWD/qssgrenderresourcemanager.cpp \
++ $$PWD/qssgrendershaderlibrarymanager.cpp