saveComments copy-editing

credit to @hermithome for writing basically all of the copy

* Update "saved" tab names to "saved  - reddit" and "saved - RES"
* Added module description to "you haven't saved any comments" blurb
* Expanded module description

![screen shot 2014-05-30 at 10 32 04 pm](https://cloud.githubusercontent.com/assets/455632/3138156/c0f8a7b6-e874-11e3-95f8-52d808cb64fd.png)