Untrack one of the OS X thumbnail files.
Partially revert e5f5064, reference styles.xml value from manifest to keep theming flexibility.

Partially revert e5f5064, reference styles.xml value from manifest to keep theming flexibility. Also switch to Holo Light by default everywhere else.
Merge branch 'master' of https://github.com/zwaldowski/ProjectTeamRocket
Give a shot at Justin's suggestions in the comments on e5f50648 w.r.t. app icon. Looks okay.