[0.3] 'More' button added, bugfixes

- 'More' button added
- Rewrote big image height detection (it was buggy before)
- Fixed a bug where a big image didn't get recognized as a big image.
- JSoup isn't compatible with < SDK 10, so our min SDK is 10 now.
Merge branch 'master' of https://github.com/jariz/GeenStijl