This PR deprecates RollingDisc.disc and replaces it with RollingDisc.wheel. This better matches the naming of the actual submodel classes and the naming of the submodels of the bicycle models.
This PR also re-enables the cache environment for the doctest, which was temporarily disabled in #128 because the cache did not contain the newest version of SymPy.
This PR deprecates
RollingDisc.disc
and replaces it withRollingDisc.wheel
. This better matches the naming of the actual submodel classes and the naming of the submodels of the bicycle models.