sfx fixes, documentation case stuff in path

fixes for
https://github.com/increpare/PuzzleScript/issues/112
https://github.com/increpare/PuzzleScript/issues/108
fix compilation of https://github.com/increpare/PuzzleScript/pull/111
botched up the pull request - does this fix it?
another test
split STRIDE into STRIDE_OBJ and STRIDE_MOV. ~5% faster. fixes #106
Merge pull request #119 from rmmh/stridesplit

split STRIDE into STRIDE_OBJ and STRIDE_MOV. ~5% faster. fixes #106