add options for boot number to help facilitate running

with qsub.
if the boot_number option is given, it only runs that bootstrap.
add in function to read in uv noise datasets.

-updated grid2ij
-read in uv noise sets.
-update plotting
-turn off fringe rate filtering of noise to match data.
-fix bug in subtract average (bls was bls_ in one loop)
add options to use uv noise files in redmultcov

add script to make the noise uv files.
Add write2uv option

Writes to uvfiles after applying covariance matrix, if you want to.
Also, saving covariance matrix and baseline draw in boot samples.
Add option to save and write covariances from a file.

Save gps, bls, covs.
Did some clean up of comments.
removed temp_noise_var variable from bootstrap saves. It is not used anywhere.
add outpath option to fringe rate filter.
Merge branch 'master' of git://github.com/AaronParsons/capo
fix covariance noise matrix in savefile

update some plots.
include in the temp_noise_var (again). Needed in bootstrapping
Updates of pspec_cov_boot.py pspec_cov_v002.py.  Honing in on robust script
Merge branch 'master' of https://github.com/zakiali/capo
Changed arp.waterfall to return handle to image
changes to pspec_cov_v002 producing OQE part 13