Accuracy of placing limbs is not always high

[moorepants]

For some ot the bicycle/rider combinations the hands and feet are not placed within machine precision, sometimes only to milimeter accuracy.

Two examples:

import bicycleparameters as bp
rigid = bp.Bicycle('Rigid', pathToData='data', forceRawCalc=True)
rigid.add_rider('Jason', reCalc=True)
rigid = bp.Bicycle('Rigidcl', pathToData='data', forceRawCalc=True)
rigid.add_rider('Charlie', reCalc=True)

[moorepants]

This should be checked again now that we've updated the algorithm in PR #18.

There is a check in http://nbviewer.ipython.org/github/chrisdembia/yeadon/blob/v1.2.0/examples/bicyclerider/bicycle_example.ipynb that could be implemented.