fixes for static build without cg
Merge branch 'cgfix'
Removed problematic ModVertexAlpha method, now done in shader
extern/shiny update: made caching more robust
cloud blending now as before (0 -> 0.25 -> 1)
Fix terrain derived data update (bug 534, bug 544)
better place for syncing
Merge branch 'master' of git://github.com/zinnschlag/openmw into terrainfix
updated changelog for 0.21.0 again
adjusted gcc settings again to avoid problems with older compiler versions
cleaned up object movement and fixed a bug regarding local scripts
Cache integrity check uses relative paths, so that changing the build folder works without reset