make pipe optional in named link syntax

make pipe optional in named link syntax+status

make pipe optional in named link syntax+priority

make pipe optional in named link syntax+tag

make pipe optional in named link syntax+issues

Most wikis don't use a pipe after the link in a named link, so users who are familiar with other wikis are likely to forget often.

Not seeing a way for us to avoid the pipe for in-wiki links (exclusively-CamelCase wikis can do it), but if anyone has any ideas, explore 'em here...

[[http://eugenesaturdaymarket.org/ Saturday Market]]

I still forget the pipe often, and i've been using Wagn for a long time.