Completely fix + expand "Chrome app with Polymer" template
Follow-up to prev commit
Reshuffle templates somewhat (normalize file names, indentation, etc.)
Enhance Polymer-ness of "JS web app" template
Add post-instantiation message re: CSP for "JS Chrome app (using Polymer)" template
Move "JS Chrome app (using Polymer)" from under a flag
Minor improvements to prev commit
Fine-tune "Run CSP Fixer" message
Shuffle/rename template sources once more
Merge pull request #3233 from ussuri/fix-templates

Fix & enable "JS Chrome app (using Polymer)" + fix other templates