Merge spawnflags with those in base classes when resolving entity definitions.
Enable GLEW experimental mode for better Hardware compatibility.
Minor changes to Windows release scripts.

Signed-off-by: Kristian Duske <kristian.duske@gmail.com>
Merge branch 'refs/heads/Release_1.0.0'

Signed-off-by: Kristian Duske <kristian.duske@gmail.com>

Conflicts:
	Mac/TrenchBroom/TrenchBroom-Info.plist
	Windows/TrenchBroom/BuildNo