Scanner now defaults to explicit list of default commands in rho_cmds.
Renames MiscRhoCmd to DateRhoCmd and updates fields accordingly.
Adds install_date and build_date to rpm query. Updates PkgInfo to use these dates.
Splits redhat-packages.ratio into two fields.
Removes unused imports. General code clean up.
Changes PkgInfo separator to required arg.
Pulls virt-what out of VirtRhoCmd and into VirtWhatRhoCmd.
Adds new field virt.num_running_guests.
Adds smoke test for VirtWhatRhoCmd.
Adds tests for fields date.date and cpu.socket_count
Adds tests for RedhatPackagesRhoCmd.
Merge branch 'csnyder/pack_scan' of github.com:candlepin/rho into csnyder/pack_scan