knockback: Allow editing completed items

Close #458
+ ENTER_KEY extracted
Moved flight out of labs
Added redirect page for flight in labs
Merge pull request #459 from passy/flight-labs-move

Move Flight out of labs
fixed url to base.css in flight example
Merge pull request #461 from mkuklis/gh-pages

fixed url to base.css in flight example
Backbone: jshint style
Ember: jshint style
Merge pull request #462 from passy/style-update

Style update for Backbone and Ember
CanJS: jshint style