Fixed the bias in nbd_lt
make_array can take in dtype
Deleted pandas import
Added calculation of sum of squares and mean squared error
Merge remote-tracking branch 'upstream/develop' into update_nbd_lt
Default fix_bias in nbd_lt is now False
Added examples of using SAR
Default behavior of nbd_lt is to adjust mu
Adjusted package call in output
Used the notation in He and Legendre to update nbd_lt
Deleted a few extra comments in nbd_lt
Merge pull request #23 from mqwilber/update_nbd_lt

Update nbd lt. Didn't thoroughly check over yet, but will do at our next code review.