updated ur submodule to c85a88b
updated ur submodule to 897ebcb
updated workflow submodule to 57324f1
updated workflow submodule to dfccc76
add usage log
no longer log commands to log file
remove command log reader
remove old command logging
new usage logging

* remove old command logging
* remove command log reader
* no longer log commands to log file
* add usage log
Updated class browser cache.
Updated `genome` tab completion.
Updated `gmt` tab completion.
exposing purity option in wrapper
passing purity as number instead of string
updated ur submodule to cdeebc5
updated workflow submodule to 2b0880b
make DV2 samtools mpileup handle empty snvs/indels output
make Genome::Logger more like a singleton
add *f methods analogous to printf
add failing test

This test shows that the memoization was independent for list and scalar
contexts.