Add profile modals for users

Hey guys, apologies for being inactive in terms of putting out PRs recently. I think that should change now that I'm settled back into Arizona life.

This PR adds profiles for users via modals. Right now, clicking on any user's name in the home page will make your user modal pop up. The next step will be to have the appropriate information pop up for each user, but that change ties in to to displaying the correct contacts list on the side of the user's page, and we can tackle those two tasks in succession.

Here's a look at what the profile modal looks like:

![screen shot 2014-08-19 at 9 21 54 am](https://cloud.githubusercontent.com/assets/5490475/3969195/b037ed96-27bd-11e4-949a-c83d01d201a6.png)

Feel free to let me know what you think! I think it may be best to shorten the date to just the day, month, and year. What do you guys think?
Ah, good catch! The comments were copied over from the other instance of `modal_close` from earlier in this file. I've deleted both instances of the comments in the latest commit.