dont expose gobble.file
change max arity for file transformers, so plugins can return promises instead of calling callbacks
use sander for fs stuff
remove insane prototype hijacking experiment
use sander in a few more places
use sander inside lib/serve
use sander inside build and builtins
remove unused file utils
update sander
use symlinking with grab and move builtins - way faster with big directories
pass src, dest and filename info to map transforms
support returning code and sourcemap from map transformations
allow string return from map transforms
misc fixes
beginnings of a test suite
transforms should take a single callback, or return a promise
update map builtin to use new transformer API
use naming conventions
throw error inside map transform on failure
link instead of copy inside map builtin