Issue 947 Improved the UI of the edit profile page

https://openhatch.org/bugs/issue947

CSS and HTML changes to improve visual apperance of the edit profile page:
1. Moved instructional text directly above form boxes.
2. Made cancel button line up with save button.
3. Changed "label" tags to "h2" or "h3" tags so that header names appear larger and bolder.
4. Included placeholders in all form input boxes.
5. Reduced row size of all input form boxes from 10 to 3 rows.

I made some changes to the placeholder themselves too i.e.: replacing geocties homepage url with github.io link and editing the contact me placeholder.

BEFORE: 
![edit_profile](https://f.cloud.github.com/assets/954858/2368950/aac58bbc-a7c4-11e3-88b9-048b98b635a9.png)

AFTER:
![947_edit_proifile_post_code_review](https://f.cloud.github.com/assets/954858/2369737/45445200-a7e7-11e3-9328-117db585e6b2.png)