possible dependency on DARC Toolbox

[drbenvincent]

In the TrialData class in badapted/designs.py we have information which is specific to the DARC Toolbox.

For example we have information about the design space (RA, DA, PA, etc)

It looks like we are going to have to remove this class into the DARC Toolbox, and to add information about providing a TrialData class into the README of this repo. Will obviously have to update import statements in the DARC Toolbox.

EDIT: If we did away with putting designs in the form of named tuples and just keep them as pandas data frames, then this class might be able to be made generic?