Add virtualenv install instructions to readme
Suggest installation of pip/virtualenv for CentOS.
Suggest installation of pip/virtualenv for Mac OS.
Fix error when source absent from GTF exporter
R: removing date from auto-generated DESCRIPTION, etc.
Properly wrap main functions
R: Removing DESCRIPTION from template process; leaving dxR-package.R as is (but with a comment pointing out where to edit it first)
Merge branch 'master' of github.com:dnanexus/dx-toolkit
Getting rid of some typo comments
Merge branch 'master' into PTFM-4820-dxcpp-refactoring