Blender Git Loki

- fixed output behaviour (now behaves just like render output,
thus directories in the path are created using RE_make_existing_file
in fluidsim.c)
- changed default output to be '//fluidsimdata/...'
- hopefully fixed bugs #3466 and #3470 (orco texture coords caused
problems when the fluidsim mesh was bigger than the original one,
one no other deformations were used - new deformedVerts are now
allocated in this case in DerivedMesh.c)