Feature/twitter bootstrap html output

I'm opening this pull-request to open conversation about an enhanced HtmlWriter output.

My reasoning for extending rather than overriding the current HtmlWriter was I feel that some would have a need for a very plain, simple, basically styled HTML Output.  While others want to generate a more styled, bells-and-whistles output where things like pretty_generate on JSON are ok.  Somewhere between what raddoc does and what HtmlWriter is doing.

This template is a W-I-P a combination of:
* what our team was doing internally
* raddoc's views
* the current HtmlWriter views

I don't think I can assume everyone outputs JSON in response_body and parse like I just did. ;)  This is a super-safe assumption for my current use case and things like this can be worked on based on discussion?