describe without ruby

no dependency on ruby & a little quicker. all credit to @derekstavis for the
cool regexs

pkg/omf/cli/omf.describe.fish

@@ -8,7 +8,7 @@ function omf.describe -a name
     if test -e $package_path
       set url (cat $package_path)
       set repo (basename (dirname $url))/(basename $url)
-      curl -s https://api.github.com/repos/$repo | ruby -rjson -e 'j = JSON.parse(ARGF.read); puts j["description"]'
+      curl -s https://api.github.com/repos/$repo 2>/dev/null | grep \"description\" | head -1 | cut -d':' -f2- | sed -e 's/["|,]//g;s/^[ \t]//g'
     else
       echo (omf::err)"$name is not a valid pkg."(omf::off) 1^&2
       return $OMF_INVALID_ARG