ignore vim tmp files
added blueprint addon with tests/dummy-app for testing
addon keyword and main file
fixes the express not define error
fixes the tests errors
acceptance and unit tests for addon command
ember-addon-main, treeFor and included methods
addon command for generating a new ember addon project
add new option to help output
output error message if new is not used with addon command.
Merge branch 'addon'
Merge pull request #1363 from fordguo/master

fixes the express not define error
Merge remote-tracking branch 'upstream/master'