fully qualify name of find method
Rearranged directory structure for chimerascan

The old structure was messy and didn't clearly segregate chimerascan
from any of the other detectors.  We want to add additional chimerascan
related code here like the filtering that is always done after
chimerascan is run but in the old structure it wasn't clear where to put
it.
Deduplicate logic surrounding Chimerascan commands

The old vanilla Chimerascan and ChimerascanVrl differ but the commands
are essentially identical, so the command logic was pulled into a base
class.
Fix weird lib managment
Cleaned up command directory in rnaseq
Rearrange directory structure for Chimerascan Commands
Reimagined directory structure yet again
Pull decision logic out of RnaSeq Model

DetectFusions command now determines what commands to fire off to do
fusion detection based on the parameters it is passed.
Make Result directory structure echo Command structure
Chimerascan builds and executes workflow