Bugfixes for OS X

This is a workaround for the column bug and a difference in behavior of grep on OS X.

1. replace "/" delimiter with " / " via sed so that column doesn't see any columns as empty.

2. remove "-m1" flag from grep. grep on OS X wasn't showing the after context when given this flag. I didn't see any negative consequences of removing it, but then again I'm not sure I understand why it was there to start with. Shouldn't there only be one match anyway?

Everything seems to work ok for me on OS X 10.9 and Ubuntu 14.04 with these changes, but I bet I've missed something.