straight forward program to just log data,
cycle time is pretty slow at 30ms

plan is to use this to get some data this sunday from an ordinary rocket launch
i would appreciate it if someone could give it a quick look over
Merge branch 'master' of https://github.com/cuspaceflight/kestrel

Conflicts:
	control_3/control_3.ino
Extra led indicator added, datalogger added

The plan is to launch the data logger in a normal rocket this sunday,
I would appreciate it if someone had a quick look over the code before then.