Lots of fixes:

* Proper AppInit extension loading
* Use double quotes in JS string and generated document
* Nicer way of using the latest Bootstrap version in the generated
document
* Use the Full Editor instead of _any_ editor
* Added `.brackets.json` file for setings
Reindent entire file using 2 space indentation
Dynamically get the latest Bootstrap version with fallback

Pulls the latest version from the Bootstrap repo using the GitHub API
Merge pull request #10 from le717/auto-version

[REVIEW ONLY] Automaticlly get latest Bootstrap version w/fallback