FAQ and other new wiki pages

[Hamish]

Hello

I've started a FAQ and a few other new wiki pages. They are

* http://code.google.com/p/hotwire-shell/wiki/FAQ
* http://code.google.com/p/hotwire-shell/wiki/ExternalPlugins
* http://code.google.com/p/hotwire-shell/wiki/CommandLineOptions
* http://code.google.com/p/hotwire-shell/wiki/KeyboardShortcuts

Have a look and let me know if anything else should be added or other
thoughts. I haven't linked the FAQ from anywhere else on the wiki
yet, and the other pages have links from relatively obscure places. I
might make a documentation home/index page where lots of stuff can be
linked from in a structured way.

[Hamish]

Also added a documentation home page to provide a structured list of
useful wiki pages.

http://code.google.com/p/hotwire-shell/wiki/DocumentationHome