Added dense formatting
Added formatting for init
Added empirical tests and renamed old_format_data
Format data takes kwargs and can eval them
Added dense data formatting for main
Fixed merge conflict
Fixed _init_ header
Used data_read_write function in main
Made evaluation mandatory when setting defaults
Added general data_read_write fxn
Made format_dense take DataFrame and output DataFrame per issue #60
Refactor distribution plot function
Fix inheritance of nbinom (tests still pass), closes #64
Added documentation and changed columnar to stacked
Added logser_uptrunc to docs
Added logser_uptrunc to models
Unittested logser_uptrunc
Comment whitespace fix
Fix fit_lsq
Remove broadcast from sum of sq, set r_squared log trans False by default