Use user's indentation size and characters preferences

![Here it is](https://camo.githubusercontent.com/293bb5a649d0bbfd4ce79934b8b65a384a28e0e6/687474703a2f2f742e77616c6c70617065727765622e6f72672f77616c6c70617065722f6d697363656c6c616e656f75732f3136303078313230302f4a61636b5f5261626269745f54726164696e675f506f73745f5369676e5f4a6f736570685f436974795f4172697a6f6e612e6a7067)


More specifically, this is round 2 of the changes. This is the exact same setup used in HTML Skeleton since v1.2.0, released back in June. Now the user's indentation settings, both size and character, and pulled from the Brackets preferences API. No more hard coded size! :smiley: This does require the minimum Brackets version to be 0.37, but considering 0.44 is about to be released, that should not be an issue. I recommend playing around with this first to see it in action.

I also updated the CDN links to match the ones given on the websites.

The auto version for the other two resources will be a bit tricker to do and might not make it this week, as the async stuff is messing me up. However, considering Bootstrap looks to be updated more than the other two, it is not the biggest concern right now. :wink: I did convert the jQuery version into a constant, as that does not need to updated automatically.

Also, expect for the version increase and change log, this is all ready for you to release.