Merge pull request #2 from ad1217/master

Update to SDK 2.0
Merge pull request #3 from ad1217/master

Update readme for new version and add screenshot
Update appinfo.json

Proper UUID, version, name and author
Merge pull request #5 from ad1217/master

Change Bluetooth icon and battery charge indicator
Update to 3.0.1 (app store release)
Simplify am/pm layer, move date layer to its own update method (so that it doesn't need to be checked each time)
De-initialize layers
Further improve 12 hour mode
Simplify battery percentage text
Added/changed comments and whitespace