Acknowledge project as commandline option for Github

[racke]

I think it would be more consistent to use project for Github repos.

racke@ambas:~/helpdesk-integration$ ./bin/helpdesk-integration --source=imap --subject=log --target=github --project="Test-Helpdesk-Integration"
github is not a teamwork instance, project would be ignored
racke@ambas:~/helpdesk-integration$ ./bin/helpdesk-integration --source=imap --subject=log --target=github --repo="Test-Helpdesk-Integration"
Unknown option: repo

[melmothx]

The TW project is the highest level which doesn't map to anything else in the other systems. Using --project as an alias for --queue would lead to further confusion about levels. So for now I've added the --repo option, which is just an alias for --queue.

I guess it would be good to have a table which shows the mapping of the various system.