Fixes#206. Two other small fixes too:
* Units don't really translate, and they are appended to java strings anyway.
If it is to be translated, do a proper formatted string.
* Placed the light theme above the dark one, since it's the default.
- use 'com.android.support:appcompat-v7:22.0.0' instead of version 20.0.0
- ActionBar color: "F-Droid Blue" (also option for "F-Droid Green")
- fix invisible swap button with Material Design
- remove "Light + dark action bar" theme (as of Action Bar is always blue/green)
The maximum interval to check repositories was "Daily". Allow to also
update weekly and bi-weekly and remove the "hourly" option (someone has
to pay for all that bandwidth after all). I was considering to even remove
the "Every 4 hours" option, but did not dare do it.
Signed-off-by: Sebastian Spaeth <Sebastian@SSpaeth.de>
