New Post Creation Template changes

Removes old new post creation template and unifies both inline and main application post creation. Includes UI for Question/Discussion post types, help text strings, and a general styling cleanup of this UI. 
Commits will be squashed down after review is complete. 

@gwprice @jimabramson - This still start out the feature branch we can add in all work for the new question type on. 
@frrrances - could you take a look through the FED work here. A lot was moved around, but feel free to comment on anything and I'll work towards cleanup (or specifically listing out follow-up FED cleanup for styling I didn't actually edit in a separate story. Thanks! 

Old: https://www.dropbox.com/s/6l7np6r2izl5trk/Screenshot%202014-07-09%2013.55.54.png
New: https://www.dropbox.com/s/xzke3uqh6mabebz/Screenshot%202014-07-09%2014.58.15.png
New: 

Correct. I've actually pulled this out entirely for now. CSS was hiding this span tag temporarily, but in order to be consistent with greg's ask that this PR not include question post type work, I've removed it for now. thanks!