Initial work on new VFS code
Delay opening of file until its contents are used
Initial directory code
Initial directory unions
Directory prefixing
Stubs of path.h/path.c
New string functions
Initial path stuff
Change path's internal structure to use il_string

It was stupid to not do that initially...
More path functions
Switch node.h/c to use ilA_path
ilA_node_contents, ilA_node_lookup
Remove mowgli code
Forgot to commit fs.h
Brought new asset API up to date
More path delimiters supported
Fix memory leaks in loader.c
Fix a bug in union.c
Fix memory leak in event.c
Move png loading to new asset code