Various bug fixes.

Fixed Word Search words scoring more than natural words in Endless mode - Thanks Lyon!

Added new leaderboards:
    - Best Endless Word - All Time
    - Best Multiplayer Word - All Time

Fixed an issue where Layer Two purchase would come up in Puzzle mode. Oops!

Added a "Daily Challenge - All Time" leaderboard

LAYER TWO

• Solo Versus - Test your skills against four different difficulties of computer opponents.
• 50 new Puzzles
• 8 new themes
• Customize your theme and app icon
• Compete on 2 new leaderboards

* Bug fixes
* Improved dictionary

- Actually turning on total letters leaderboard... oops!

- Add total letters played leaderboard
- Fix issue with older iOS versions reporting leaderboard entries (thanks Sky Dancer!)

- Fix for issue when posting to leaderboards

- Added ability to reset all multiplayer data

- Added a Multiplayer tutorial with instructions on how to enable Game Center

- Removed some weird dictionary entries!

- Added undo to puzzle mode

- Adjusted readability of light text on light background
- Fixed duplicate entry on 'Leaders' puzzle, sorry Napoleon.

- Added music, toggle in Options
- Added new leaderboard to track deepest depth in Endless
- Added higher resolution app icon