Update license

New terms as of July 15th, 2014.
http://try.crashlytics.com/terms/terms-of-service.pdf
Update terms link on README
Merge pull request #13 from phatblat/pr/license

Update license
Updated Crashlytics to version 2.2.4 (September version). Release notes state:

September

iOS SDK
// New:
- Removes requirement to import Crashlytics in your bridging header for Swift apps.

Crashlytics Mac app
// New:
- Support for seamless Swift app onboarding via plug-in.

Since our release notes are light this time around, want to hear our pizza joke?

Never mind...it’s a little cheesy ;-)
Bumped podspec version to 2.2.4