Adding interface functionality
Merge branch 'master' into interface to get golriz's data
Consolidating data files
Added ability to join with delimiters to data_process
Reversed delimiter order to match split_string
Made some test data in the correct format
Put Lagrange multiplier into fit
Added argument for passing model file to interface
Add a nice way to reorder Voigt matrices to lintools
Attempt to vectorize fung model.  May not work
Put orthotropic stiffness and model exposure in fung.py
Exposed the fung model with isotropic stiffness (2 param)
Merged in vectorized fung model from fung-vec
Vectorized tensor product
Finished vectorizing Fung functions
Vectorized holzapfel SEDF and P.  Needs test
Finished vectorizing holzapfel, including D
Exposed consistent interface for holzapfel model
Added bounds data file
Removed worthless load_files function