added maven2 install script for travis
added maven2 install script for travis

ojacobson/dryad-repo,jimallman/dryad-repo,ojacobson/dryad-repo,ojacobson/dryad-repo,jimallman/dryad-repo,rnathanday/dryad-repo,jimallman/dryad-repo,jimallman/dryad-repo,rnathanday/dryad-repo,jimallman/dryad-repo,rnathanday/dryad-repo,rnathanday/dryad-repo,ojacobson/dryad-repo,rnathanday/dryad-repo,rnathanday/dryad-repo,ojacobson/dryad-repo,ojacobson/dryad-repo,jimallman/dryad-repo