Minor bug fixes and cleanup

Main change here is the radio init routine. It is more robust to initialize the radio.

Added support for Freakduino 2.4 GHz Long Range Board

• Modified code so that it could support Freakduino 2.4 GHz Long Range boards

chibiArduino v1.07

• Updated README with useful information
• Fixed bug that wouldn't allow it to wake properly after sleep
• Fixed bug that didn't properly support Saboten

chibiArduino v1.06

New Features

• Added chibi_ex10_sensniff - An example to allow sensniff to act as a protocol analyzer in promiscuous mode
• Added chibiGetChannel() function for compatibility with sensniff
• Added chibiGetChannel() to documentation
• Added chibiGetBufRemaining() to calculate remaining space in receive buffer

Bug Fixes

• Fixed bug in chibi_ex10_sensniff
• Fixed non-unicode character in chibiUsrCfg.h that caused some strange problems
• Fixed typos and documentation bugs