Enforce style consistency in code examples

[ajpiano]

Right now, we have a lot of code examples in the blocks in our markdown content that come from a lot of different sources - assorted blog posts, the jQuery Fundamentals book, docs.jquery.com, etc. We need to make sure that these examples are wrangled to conform with the jQuery Core style guidelines (with the minor caveat that we'll use two space soft tabs instead of 4 space tabs) so that there is consistency in the coding and commenting in all the examples on the new site.

[ajpiano]

@bobholt's work in #178 addressed the lion's share of this, but I'm leaving this open so we can keep it in mind through the soft launch milestone and do a final once-over

[gnarf]

I'm going to take a crack at reviewing the code style right now.