Updated rename tests
enable permissions checks after initialization
 - convert to new stream API function names
 - convert all indexing into FS.streams to use FS.getStream
Split out createPreloadedFile to FSCOM
initial VFS work
hacked createLazyFile to work with the new FS code
Added node.js license info
Removed USE_OLD_FS
Merge pull request #1458 from inolen/vfs

initial vfs work