Merge pull request #11 from jolyonb/jolyon

Implemented a number of models, wrote instructions for creating a new model
Merge pull request #12 from jolyonb/jolyon

Cleaned up kessence implementation
Merge pull request #13 from jolyonb/jolyon

Finished kessence treatment. Moved src to source folder
Merge pull request #14 from jolyonb/jolyon

Interpolating to exactly a = 1
Merge pull request #15 from jolyonb/jolyon

Added calculation of distance measures
fr

starting fr
Merge pull request #16 from jolyonb/jolyon

Many minor changes
Added chi^2 calculation for SN1a data