If gender code not in .json, default to -9 instead of crashing
Initial commit
Note that gender codes are optional
Added option to write mean metric text
Change help text; bugfix in uri uniqueness check
Output sample count for evaluation in verbose mode
Support text output of mean concordance/gain
Added copyright text
Revise mean/sd sanity checks and heuristic for choosing z score
Initial commit of GPLv3 license
Merge pull request #4 from iainrb/devel

Changes to zscore calibration heuristic and licence