Catch bioblend import errors and re-raise at usage time to avoid problems when not using Galaxy integration. Fixes #12
add better error messages if program not found. see #13
Merge pull request #14 from brentp/error-msg

add better error messages if program not found. see #13
Documentation: graphical overviews of variant calling and parallelization
Merge branch 'master' of github.com:chapmanb/bcbio-nextgen