separate concerns and help reduce and clarify dependencies.
cfg and mcfg are too similarly named and are not obvious. Renamed cfg
to currentProfile and mcfg to masterConfig. This will increase source
code line length somewhat but that's ok; lines of code doing too much
are now easier to spot.
of determining a revision code. Previously there was mpu6050 specific
code in cli.c (the status command).
Finally this commit has removed all non-serial port configuration
settings from core_t so that a future commit can refactor core_t to
reduce dependencies on serial port code.
In doing this I also noted from other source code that the MPU6050
accelerometer trim for some revisions appeared to be incorrectly set to
255 * 8 instead of 256 * 8.
