Grunt Task: Build custom package.manifest validator

[warrenbuckley]

Write a custom grunt task & push to NPM for us to use in this YeoMan Generator.

The grunt task could be used on Watch for the package.manifest or other build steps & give specific errors or information on why the JSON is not valid.

i.e missing an alias for example.

Per just send me a link to this for idea/inspiration: https://github.com/Atinux/schema-inspector

[warrenbuckley]

I just found these that are worth noting: https://www.npmjs.org/package/grunt-json-schema