Fixes bank selection (wasn't pulsing chip select).
Adds examples directory with unit test application.
Temporarily removed private section from class to allow test program to work. May add tests to class.
Changed default chip select pin to 10 (which is next to the SPI interface on my Pro Mini).
Update code to match release notes erata B7.
Add ability to set LED mode.
Changed licence to LGPL V3 (no one seems to have downloaded the code yet!)
Fixed errors with some bit flags.
Added debug output **MUST REMOVE BEFORE NEXT COMMIT**.
Changed position of some functions in source code to better match include file.
Fixes (and renames some) SPI functions.
Add (too many?) comments, many lifted from ENC28J60 release notes. Makes it clear how code matches release note implementation.