Disabled the creation of package.js

Disabled the creation of package.js in the public folder of a custom package.

The creation of package.js causes this issue https://github.com/linnovate/mean/issues/963
Deleted package.js template
Fixed typo ceate to Create
Add Gitter badge

fixes #73
Merge pull request #72 from iolufemi/master

Disabled the creation of package.js in the public folder of a custom package.
Merge remote-tracking branch 'origin/master' into cli-paas