Add .gitignore

The .gitignore file is based in part on GitHub’s
gitignore/Android.gitignore and my own experience in preventing
repository clutter when using Eclipse.
Add README.md

A README.md file with an About section, as well as a (very basic)
section on building the code.
Whitespace and Comments in AndroidManifest.xml

Made whitespace more consistent in AndroidManifest.xml, and added
comments to clarify the easter egg that each Activity and Service pair
belongs to.
Quick fix for README.md
Added RocketLauncher
Merge remote-tracking branch 'xbirdie98/minorEdits'