Cleanup on TSV-DCML Converter

[mscuthbert]

a little cleanup of typing and fix docs

[coveralls]

coverage: 93.02% (-0.01%) from 93.033%
when pulling c9350c5 on tsv-cleanup
into 3fae7a1 on master.

[coveralls]

coverage: 93.021% (-0.01%) from 93.033%
when pulling 4df9575 on tsv-cleanup
into 3fae7a1 on master.

[coveralls]

coverage: 93.017% (-0.02%) from 93.033%
when pulling 598557a on tsv-cleanup
into 3fae7a1 on master.

[coveralls]

coverage: 93.017% (-0.02%) from 93.033%
when pulling d4fb6e4 on tsv-cleanup
into 3fae7a1 on master.

[coveralls]

coverage: 93.015% (-0.005%) from 93.02%
when pulling c6584a9 on tsv-cleanup
into 4716deb on master.

[coveralls]

coverage: 93.017% (-0.003%) from 93.02%
when pulling c6584a9 on tsv-cleanup
into 4716deb on master.

[coveralls]

coverage: 93.017% (-0.003%) from 93.02%
when pulling 3540deb on tsv-cleanup
into 4716deb on master.