Added two-site binding model to 130614 analysis doc
Added end argument to truncate_timecourses in plate_assay

Allows the ends of timecourses to be chopped off, not just the
beginnings.
Datasets for Bax43C experiments on 9/3 and 9/5
Added data/doc for wallac test on 130906

Using the full-area 96-well plate appears to have fixed the
irreproducibility I was seeing.
Rewrote code for fitting bax_heat titration

Changed name of module from bax_heat to titration_fits.

Still need to update the plotting code that uses this func.
Plots and docs for 130903 dataset
Allow dye release dataframes with no SD

This is needed for creation of dataframes from simulation results.
Updated 130614 docs to use titration_fits
Updated titration fit MCMC reporter to use new fitting code
Updated duplicate plotting code for 130903 docs

Now the plots of k_n vs. concs is centralized in the
plot_fits_from_dataframe method in titration_fits
Updated 130614 to use common plotting code
Docs/plots for Bax 43C 130905 dataset
Fixed CptDataset fits to use new titration_fits code
Module doc for titration_fits code
Updates to models.core

* Implementation of one- and two-step Bax auto-activation
* Implementation of Bax aggregation at pores
* Implementation of non-activating conformational change (BH3 exposure)
Added plots/docs for 130830 mdivi-1 experiment
Merge remote-tracking branch 'origin/master'