Add python libraries used by CloudMan boot
Include bedGraphToBigWig in UCSC tools
Merge branch 'master' of github.com:chapmanb/cloudbiolinux
Merge pull request #66 from brainstorm/master

UCSCGenome similar crash on dl_name attribute
Catch errors and provide warnings for trying to get RNA-seq and dbSNP resources that are not available. Thanks to @brainstorm. Closes #67