update file apis
remove todo
Merge pull request #72 from dart-gde/files2

update file apis
whitespace only change
Merge pull request #73 from dart-gde/whitespace

whitespace only change
fixes to the return param arity
fleshing out the file system impl; chooseEntry now works
Merge pull request #74 from dart-gde/more-files

More files
expose file read, write, and dir listings
revert the Event ==> ChromeEvent rename
Merge pull request #76 from dart-gde/file3

File3
rev to 0.0.6
rev to 0.0.7-dev
remove use of jsify; ==> new JsObject.jsify()
converting enums; serializable goes away
finished adjusting to Serializable going away
Merge pull request #78 from dart-gde/remove-serial

Remove serial
rev version to 0.0.7
rev version to 0.0.8-dev
fix to reading and writing files; due to dart:js changes