Some updates to scripts.

plot_uv_zaki.py          : can avg baselines now
pspec_pk_k3pk_boot.py    : options for plotting lst hours.
pspec_redmult_cov_gps.py : some comments.
plot_red_cal_coeffs.py now plots against lst as well.
changes tp pspec_redmult_cov_gps.py

-Add option to add message to save to bootstrap npz files.
-seed the random module everytime you run the script.
-misc print statements.
-try except statement for dividing out weights when calculation the avg
    of the cov pairs within a group. For groups that only have 2 unique
    baselines, this causes a division by 0 error and the program quits.
    For the the 32 ant diagonal (11, -11) baselines this was occuring
    too frequently. Now if we get a divide by zero it just sets the sum
    to be zero.
add plotting vs lst for plot_red_cal_coeffs.py
change default nboot back to 400 in pspec_pk_k3pk_boot.py
pass is pspecs are nan in pspec_pk_k3pk_boot.py

Doesn't affect the rest of the code.
Merge branch 'master' of shredder:/usr/global/paper/capo
Add some more plotting options.

set f-factor to one in pspec_plot... (because use the correct pictor I).