Removed early install of pipes-attoparsec in lieu of changes in marquise-2.8.2
Marquise 2.8.2 has a minimum version requirement for pipes-attoparsec which
should force cabal to not install a lower version of pipes-attoparsec and
cause travis builds to fail
Merge pull request #29 from anchor/fix_travis

Removed early install of pipes-attoparsec in lieu of changes in marquise...