Added content to metab.bookkeep

This is my old school bookkeeping metabolism code. Note that this
version of bookkeeping needs O2 data from parts of 3 days: all of Day
T, the nighttime of Day T-1, and the early morning of Day T+1.
Merge pull request #2 from jread-usgs/master

Documentation & build fixes, make k methods more generic, removed bayes function.
small changes to metab.bayesian.R

This may not have worked because there were several assignments <- that had nothing on the right-hand side. Also, I don't think my code needed the "rjags" library, so I commented it out for now. Several lines are currently in place for testing purposes (section "Read in data"), and will be deleted later.
put metab.bayesian back in original directory

test if the function works.  also, would it be possible to leave the
files in the same directory, unless the move is intended to be
permanent?
Fixed some of the mis-labeled example data.
Added reference info for wind scaling function.
Removed "in prep" files to create version that passes biuld test.
Removed unused imports so the package compiles.