Add some links and new cards+tips
- To link to special addresses on wagn (pages with names that aren't normal card names), like Recent Changes or Sign Up, just start the address with a slash: Eg. [ [ /recent | Recent Changes ] ]
- Don't worry about plurals or cases; Wagn handles those for you. Notice how FEATURE, feature, and Features all take you to the same card.
- See editing cards for more documentation.