Automated updating manifest, plus keep activity from appearing in 'recent' list

1. Keep activity from appearing in 'recent' list by setting excludeFromRecents="true" on activity.
2. Python script for pulling list of shorteners from longurl.org, adding in our own list of shorteners which are not included, and emitting a templated AndroidManifest.xml file (template in the python script).
3. The new manifest is included.
![Photo on 3-18-13 at 11 11 AM](https://f.cloud.github.com/assets/679461/271183/166405d8-8fde-11e2-8d5e-f16e820d7a49.jpg)