(add) locations system
(add) spherical shadow
Merge branch 'master' of github.com:imhatep/earth

Conflicts:
	proj/qt/earth.pro
	proj/qt/earth.pro.user
	src/glwidget.cpp
	src/graphcicEgine/graphicengine.cpp
	src/graphcicEgine/graphicengine.h
	src/graphcicEgine/locationstationobject.cpp