Fix chromosome naming issue

Fixes an issue related to chromosome naming that prevented output for certain chromosome naming conventions.

Edge trimming and better chunk indexing

New CNV edge-trimming algorithm removes low-quality targets from edge of otherwise high-quality CNV calls. Also features an improved method of chunk assignment, which offers a slight PPV improvement

0.6.5

Fixes a serious issue involving calls on the Y chromosome, which may have been missed in earlier versions. Calls on other chromosomes were unaffected.

cobalt-0.6.4

Minor updates to improve model provenance:

• Store the full list of samples used to build the model in the model file
• Store all model building arguments in the model file
• Update output of cobalt desc -m to emit sample list and model args.

No changes to core functionality or CNV detection algorithm

0.6.3

First public release of cobalt. Expect documentation updates and bugfixes shortly.