Add version check to `check_installed` command
Support `install` command on FreeBSD
Support return package version for installed packages on FreeBSD
Merge branch 'master' into add-command-for-freebsd
Add install and get_package_version for FreeBSD10

like 34a45cf and 7c2a3da
Merge pull request #56 from tacahilo/add-command-for-freebsd

Add commands for FreeBSD