Accept options for `pkgpanda add`
Accept options for `pkgpanda add`

This makes `pkgpanda add --repository` work.

mnaboka/dcos,mesosphere-mergebot/mergebot-test-dcos,kensipe/dcos,mnaboka/dcos,mnaboka/dcos,kensipe/dcos,lingmann/dcos,darkonie/dcos,mellenburg/dcos,kensipe/dcos,asridharan/dcos,xinxian0458/dcos,xinxian0458/dcos,jeid64/dcos,amitaekbote/dcos,mesosphere-mergebot/dcos,GoelDeepak/dcos,dcos/dcos,vishnu2kmohan/dcos,jeid64/dcos,darkonie/dcos,asridharan/dcos,mellenburg/dcos,surdy/dcos,dcos/dcos,GoelDeepak/dcos,dcos/dcos,GoelDeepak/dcos,jeid64/dcos,dcos/dcos,amitaekbote/dcos,kensipe/dcos,BenWhitehead/dcos,lingmann/dcos,asridharan/dcos,darkonie/dcos,branden/dcos,darkonie/dcos,mellenburg/dcos,amitaekbote/dcos,BenWhitehead/dcos,branden/dcos,dcos/dcos,mesosphere-mergebot/mergebot-test-dcos,lingmann/dcos,asridharan/dcos,mnaboka/dcos,darkonie/dcos,branden/dcos,vishnu2kmohan/dcos,mesosphere-mergebot/mergebot-test-dcos,amitaekbote/dcos,surdy/dcos,branden/dcos,vishnu2kmohan/dcos,GoelDeepak/dcos,lingmann/dcos,surdy/dcos,vishnu2kmohan/dcos,xinxian0458/dcos,surdy/dcos,BenWhitehead/dcos,mesosphere-mergebot/dcos,mesosphere-mergebot/mergebot-test-dcos,jeid64/dcos,mesosphere-mergebot/dcos,xinxian0458/dcos,BenWhitehead/dcos,mellenburg/dcos,mnaboka/dcos,mesosphere-mergebot/dcos