Replace CDN url where SGE is retrieved from during CloudMan config; include novnc into CloudMan config
CloudMan now handles editing /etc/exports when managing file systems so don't bake all the file system into the image
Update virtualenv-burrito install command as per the docs
Add additional perl libraries required by VEP installer
Ensure we correctly mark comments when tabix indexing dbNSFP with recent versions of tabix
Improve dbNSFP download: enable continues and use same file directory instead of global /tmp to avoid space issues
Merge branch 'master' of github.com:chapmanb/cloudbiolinux
Update Tophat to grab from the new JHU URL.

Closes chapmanb/bcbio-nextgen#447
Remove source builds for cufflinks and tophat which are no longer maintained
Merge branch 'master' into nmdp-ngs-pipeline