Update contribute documentation to reflect the new location, and the problems potentially encounted by forking.

[nigelgbanks]

Update the http://islandora-labs.github.io/islandora/contributing/contributing/ page so that it reflects the new location (http://github.com/islandora-labs/islandora -> http://github.com/islandora-CLAW/CLAW), also include a note that forking from this repository is not possible if you already have a fork of the existing http://github.com/isIandora/islandora, and that as a contributor you can continue to use your fork of http://github.com/islandora/islandora repository but be to be careful with branches, and that your folder names may not match the repositories names you commit to. Hopefully won't have an affect on build tools.

[nigelgbanks]

Hmm another thought, should also change

1. Send a pull request to the Islandora GitHub repository that you forked in step 1. If your pull request is related to an existing Islandora issue -- for instance, because you reported a bug/issue earlier -- then prefix the title of your pull request with the corresponding issue number (e.g. ISLANDORA-123: ...).

To reflect that the issues are being handled in Github rather than JIRA? Or will we be switching back to JIRA soon?

[ruebot]

It'll be a while before we got back to JIRA.

Any updates or suggestions you have to the contributing documentation are more than welcome. Send a pull request, and we'll review 😄

[whikloj]

Resolved with Islandora/chullo@e372aba and ee9c0ff