* Expose constraints attribute in UI
 * Cleanup the Javascript (thx @ssorallen)
 * Cleanup the Javascript (thx @ssorallen) #402
Prefer native `trim` and `map`

Marathon supports IE9+, which implements the necessary functions. No
need for Underscore.
Shorten `every` call; Wrap constraints in ticks

Backticks turn into `<code>` blocks in Markdown.

TODO:? render error messages as Markdown.
Revert " * Cleanup the Javascript (thx @ssorallen) #402"

This reverts commit 03af237d8c35f6392bec5f1a13affda327790321.

Removing plugin until deemed necessary.