Added additional plots to nbd_data page
Some minor notes and edits to nbd_mcmc_run and knowledge.py
Initial commit of parallel tempering class for NBD models
Changed report filename to index.html
New plots of grid data in docs
Ignore log files
Cutoffs on prior; correct translocation for tBid

Bound all rate priors at -5 to -1 (could potentially go to -6 to 0).
Bound the scaling parameter more tightly as well. If beyond these
bounds, return np.inf.

Fixed the vesicle translocation so the concentration of the vesicles
could be changed (e.g., in a titration experiment) and the equilibrium
fraction of bound Bid would change accordingly. Added a new file,
lipo_binding_curve.py, to illustrate this.

Also some additional notes in knowledge.py.
Some tweaks to the serial PT scripts to fix pickling

Got rid of the pickling functions because they weren't working, and
inserted a debug message into the script instead (so that chains can
be inspected interactively after the run finishes).
Run script for MPI PT of NBD models