Merge pull request #82 from jsantell/master

Use 0.0.3 of jetpack-validation to clarify transition for previous cfx, fixes #80
Merge pull request #83 from jsantell/master

Display help text when no arguments provided to CLI, closes #78
Merge pull request #85 from jsantell/master

Fix default jpm help printing for xpi/init
Merge pull request #90 from jsantell/master

Inc 0.0.8