Updated the compiler target api to android-19 for IOIOLib, and fixed all...

... lint/deprecation related warnings. (left minimum SDK for compilation at 3).

Hey Ytai,

This is the first step in "squashing" all libraries into 1.
I put it to compile against SDK19, just because it's the newest. I don't think there's any reason to go lower, even though we don't use anything that is newer than SDK15... but let me know what you think.

Thanks.