Move dev/contribution to its own file

It is now time to set guidelines for contributing to midas.
Add initial guidelines based on angular.js to our project
in the CONTRIBUTING.md file.
Fix link to code style

Update the markdown.
Fix missing )

Needed to close the parens.
Everything should be done on devel

Devel is for features in progress before being rolled to
production.  Master is for production.  Update the docs
to follow our gitflow model.
Minor clarifications

Additional changes to clarify how to report issues
Update backbone section

The backbone section was woefully out of date.  Remove
docs that don't exist anymore.
Merge contribution guidelines

Merge branch 'sprint11' into sprint11-feature-comments
Fix for comment box not expanding (#150)

This was way easier to fix than I thought.  Since the
area is a div and not a textarea, we can just override
the `height` css of bootstrap and set a `min-height` for
initial use.  This lets the text area expand/contract
with the text size.
Rename class, move submit button

The submit button should follow the the expansion of the
text box; it now does that with `vertical-align: bottom`.

Rename the class for the input to be more explicit and
eliminate reused classes (like .comment).  Now called
.comment-input

Related to #150.