fundraiser view nitpicks

Partially closes #57.

- [x] Show updates/titles above the fundraiser body (like we did in previous frontend)
- [x] italicize the “# claimed” text (or use something bootstrapy) to differentiate the text
- [x] Rename Pledges tab to “Backers”
- [x] “By developername” text is lost on all subpages, let’s bring it back ***(was already fixed)***
- [ ] Facebook share button needs to come back
- [x] Change default wording on Twitter/Facebook shares “Support (fundraiser name) on @Bountysource! urlhere”
- [x] URLs for home and repo are missing ***(was already fixed)***
- [x] if you're the creator, and the fundraiser has ended, add an alert to the top "All money raised is now in your Bountysource account. You can request a cash out here."
- [x] pledge now screen... change reward Reward Survey title to “Reward Survey. You can edit your response later if you need to.”

For Facebook, we still need to know the Facebook AppID.