Simplified code w/ setSpan()
Fixed handling of headers

In particular, Bypass would crash when presented with an h6.
Scale indentation based on device density
Added Bypass.Options for rendering config

There's no "official" way to render markdown --> spans, so there's
definitely a case for customization of certain elements. In the
future we could expand these options to encompass even more elements.
Got rid of excessive newlines around block elements
Added indentation to block quotes

Makes them look prettier not being rammed up against the QuoteSpan
Added customizable block quote color

Otherwise it always shows up as ugly blue... ick.
Added customizable header sizes
Merge pull request #160 from trello/android-parser

Android parser improvements