v0.1.1 - PNG support!!

Well, that took longer than expected! The real world and my own code seemed to be conspiring against me :-)

New in this version: 

1. Carts in PNG format can now be loaded. 
2. Multicart games are supported. All carts in a multicart game need to be in the same folder and with the correct names.
3. Many compatibility fixes. Many more games that did not run or had graphical problems now work correctly.
4. Loading screen, so you can see the cart you are loading.
5. Better error reporting. If a game crashes the error is displayed on the screen but can also be saved to the SD card by using the "Save Error Log"  option in the pause menu. The error log is written to the same folder as the cart that caused the error. This should make it easier for users to report compatibility problems.

Enjoy!