Add support for FusionCatcher

[iskandr]

Identifies fusion proteins from RNAseq and also catches expression of viral sequences:

https://github.com/ndaniel/fusioncatcher

[hammer]

May also want to consider https://sites.google.com/site/bioericscript as it's what UCSC's ProTECT uses for fusion calling in their neoepitope selection pipeline.

[arahuja]

I actually did this at some point: 4f3449d

I'm 80% certain this worked, but will re-test and submit a PR. The issue was that on many, many BAMs this required > 60 GB memory and would fail, which was really unfortunate.

[hammer]

Grab a highmem type! https://cloud.google.com/compute/docs/machine-types

[arahuja]

Yea that is actually what spurred my move to gcloud originally, got a 128G machine to run all of our samples through.