Added option to use certain baselines only.

Default behaviour is to use the all baselines of the baseline
separation given.
The new --usebls options uses only the baselines provided in
the -a option.
Merge branch 'master' of git://github.com/zakiali/capo

Conflicts:
	pspec_pipeline/pspec_redmult_cov_gps.py
Adding Carina's directory to capo
Remove submodule entry
Adding Carina's directory
Remove submodule entry
Adding Carina's directory
Merge branch 'master' of git://github.com/dannyjacobs/capo
Merge branch 'master' of git://github.com/carinacheng/capo
Edit to ctc/single_baseline.py for simulating visibilities from healpix sky model
Merge branch 'master' of git://github.com/dannyjacobs/capo
updated code
adding gitignore
updated code
Merge branch 'master' of git://github.com/carinacheng/capo
Edited dbi to remove bit_length usage, aiming to make the code compatible with python2.6
Added scripts/launch_shredder_compress.sh in ddr_compress
Merge branch 'master' of git://github.com/AaronParsons/capo.  Reverted single_baseline.py in ctc to 4a19

Conflicts:
	ctc/code/single_baseline.py
Temporary fix to dbi.py for running on a host that is not pot (e.g. shredder)
Made scp not use strict host key checking, for when running on shrdder nodes that hvae changed identity.