Add new -f|--follow option for tailing files

if provided, $fh will open pipe to tail -f instead of the file directly. useful
for lazy people like me who don't like typing.

Also added myself to contributor list.
wrap filename in quotes to prevent weird names from breaking things
Proper handling of filenames with LIST args to open()

rather than having to deal with shell quoting issues, we avoid it entirely by
passing list args to open instead of using 2/3 arg form. Solves single quote
' TODO.
Merge pull request #5 from mattp-/master

Add new -f|--follow option for tailing files