Gui tweaks for 1.0

a set of tweaks, mostly aesthetic, some functional. the controversial changes:

 - in markdown-mode, I only show posts/reactions and, if necessary, the messages that they're replying to. this makes the feed view much more usable. you can toggle to raw view to see everything
 - I reduced the emoj-ids in the message headers to 2 emojis. this does weaken the short id a lot, but it makes them much easier to visually scan. 8 emojis was just clutter. could try 3 or 4

attached is a gif that washes out the color and doesnt have some of the final tweaks, but gets most of it
![phoenix-demo-12 29 14](https://cloud.githubusercontent.com/assets/1270099/5571675/2dd5d624-8f5a-11e4-97ca-9a58070a0a72.gif)