JILS-38: KanBan view

As well as a new page to display the KanBan view, this'll need changes to parseSEF and qs2sef

Have added (and tested) routing for a new Kanban view page.

When calling qs2sef the supplied URL should include "kanban=1". The returned URL will be something like "/browse/JILS-kanban.html" or for versions "/versions/JILS-1234-kanban.html"

I've made the index.php change to direct requests to the Kanban template for a project's overview, but haven't done so for versions yet (as the former will likely form a template for the latter anyway).

Will worry about (and work out) how to handle swimlanes later, but to begin with we're going to want 3 columns

- Open
- In progress
- Resolved/Closed

Need to look at how JIRA handles the ordering. Probably worth double checking how it does it's selection as well - I've a feeling it's a raw Issue status check - in which case we'll probably want to pull the board config from JIRA so that any board settings are taken into account (for example if someone's created a custom issue status).

We'll need to run a check for board config at a later date anyway as probably only want to show a link to the Kanban page for projects that are actually using Kanban.

Have added a new configuration option - "kanban". If set true, it'll allow the kanban board to display, if not, it won't.

Needs some work though, I'd prefer not to return an empty page, and instead display a small HTML page (explaining the redirect) with a meta refresh so that if a project is mirrored with wget, and references to Kanban that accidentally slip in don't break.

Bulk Change.

Clearing out old issues - it's unlikely I'll find time to do any further work on JILS.

New issues will be raised for relevant items if that proves not to be the case