Fixing internal link references.

Modified `DESIGN.md` and `FAQ.md` to refer to `CUSTOMIZATION.md`
without an anchor reference to the variables section.
Merge branch 'gh-pages' into fixing-internal-links
Addressing feedback from @dlebauer
Merge pull request #81 from gvwilson/fixing-internal-links

Fixing internal link references.
Renaming the workshop creation script for upload to Software Carpentry website.

This PR renames `tools/create` to `tools/swc-workshop-create` so that when we upload it to http://files.software-carpentry.org, and people download it from there, its purpose will be clearer --- `create` on its own isn't particularly meaningful.

This PR also does some minor copy-editing on messages inside the script.
Merge pull request #90 from gvwilson/renaming-creation-script

Renaming the workshop creation script for upload to Software Carpentry website.