Changed various commands to use PKT_UNPACK, rather than indexing into frame[]
Changes to make Chen Li's robot work.
Merge branch 'multirobot_python_devel' into chen_li_robot

Conflicts:
	firmware/source/main.c
	python/experiment.py
	python/shared.py
Various changes to get code working on Chen's robot.
Trying to make pid-ip2.5 module more general.
Merge branch 'cmd_unpack' into devel

Conflicts:
	firmware/source/cmd.c
Modifications to remove externs between cmd/pid modules
Removing PID related externs from cmd module.
Merge branch 'cmd_unpack' into pid-code-update

Conflicts:
	firmware/source/cmd.c
	firmware/source/cmd.h
Minor fixes after merge.
Applying new #defines in arguments to new pid module functions
Merge branch 'pid-code-update' into devel

Conflicts:
	firmware/source/settings.h
	python/experiment.py
	python/experiment_multibot.py
	python/shared.py
Merge remote-tracking branch 'origin/devel' into devel

Conflicts:
	lib/pid-ip2.5.c