Kicking off the netiquette file

If you type "faq" at the command line, you see a lot of great content from @ftrain. @jessamynwest and I discussed perhaps dividing the culture stuff ("no guilt") from the frequently asked questions stuff ("how do I ...") and that's how we've ended up here. Two documents, faq and netiquette.

Happy to hear suggestions for improving this page, plus we need a few links added:

1) We need to link to the scripting netiquette doc
2) We need to link FAQ to netiquette somehow. We're currently thinking netiquette can just live in the ~faq/ directory.