Added the ability to save comments, and view and manipulate them.

Here are some images of the new additions:

The option to view saved comments appears when viewing threads or comments, and only if the user is logged in.
![menu1](https://f.cloud.github.com/assets/857608/859939/d55584ba-f58e-11e2-85a1-71584cc6ba24.png)
![menu2](https://f.cloud.github.com/assets/857608/859943/14ae4bba-f58f-11e2-87cc-0566486198b4.png)

View of the comment click dialog when the comment is unsaved and the user is logged in:
![ccd1](https://f.cloud.github.com/assets/857608/859949/6e90f948-f58f-11e2-93d1-cb508242ebae.png)

View of the comment click dialog when the comment is saved and the user is logged in:
![ccd2](https://f.cloud.github.com/assets/857608/859957/9dc67bf2-f58f-11e2-8b5a-98f8cbdc0ef3.png)

View of the comment click dialog when the user is not logged in:
![ccd3](https://f.cloud.github.com/assets/857608/859960/d2b6ee82-f58f-11e2-83d4-e9a600ff6a5d.png)


View of the list of a user's saved comments. Note, the usual menu comes up when the user hits the menu button on their phone, just like on all other pages. The functionality for this page is no different.:
![savedlist](https://f.cloud.github.com/assets/857608/859969/1849430a-f590-11e2-8278-ae74f028f365.png)

View of the dialog that pops up when a user clicks on one of their saved comments in the previous view. The view option takes them to the comment in the thread it was posted in.:
![sdialog](https://f.cloud.github.com/assets/857608/859983/63b994a2-f590-11e2-9116-bf04e738d3cc.png)


That's the majority of the new content added. The workings of it can all be viewed in the code of course.