replaced more I2Cdev functions. implemented fixes (mostly) mentioned in issue #0. readMaskedRegister, writemaskedRegister references broken. Will fix once I have travelled half way around the world and survive jetlag. magnetometer not fully fixed, also will fix before next push.
added Mag sensor register static variables. Requires masks still. fixed some read/writeMaskedRegister return values
consts added to functions that don't change the input.  replaced more buffer[0] references to return actual fail/success status's. masked registers are getting closer to completion. more bool write* responses to tell if the write was successful