Update style for buttons

Use min-height to ensure that buttons properly center themselves
Give labels more breathing room

Visually space out the labels and the fields.
Ignore .env
Adds dotenv gem dependency

Use dotenv gem to set env variables for testing in the .env file
Adds rationale form

Adds the form back in without media

references #181
Adds a bit of padding to header

Space the header a bit to give more room between the button and the content area
Lock Susy at 1.0.9

So this doesn't clobber compass, lock in Susy dependency at 1.0.x
Use post_rational labels

Use the code already in the file to more consistently name the post_rational

references #181
Fixes Rationales

Properly inserts rationales to the posts handler for a move.

closes #181
Merge branch 'feature/rationale_form' into develop