Commit before beginning coding of new I2C modules
Featurized master/slave i2c... build worked for slave 9/26.... beginning work on master i2c
Working I2C master code but bad code form... plan to clean up
Fixed I2C implementation to one that runs off of interrupt handlers... Test framework was also updated to repeatedly drive reads and writes... Currently no implementation to get value back out of interrupt handlers to main
Fixed all build warnings for PORTB and i2c_helper
Merge pull request #9 from bballtwenty8/dev_i2c

DEV_I2C merge in before milestone 2