Bugs related to routes arising from API refactor + removal of default routes

[rgrp]

Various bugs I've been encountering:

• Autocomplete of tag names no longer works (no longer works on ​http://ckan.net/). Appears to be due to no longer have a routes for apiv2 (i'm seeing failing calls to: ​http://ckan.net/apiv2/package/autocomplete?callback=callback&incomplete=a)
• Incorrect url generated for API in page footer (e.g. ​http://ckan.net/rest/get_api) due to use of old 'rest' rather than new 'api'

Latter issue was masked by existence of 'default' routes:

   map.connect('/{controller}', action='index')
   map.connect('/:controller/{action}')
   map.connect('/{controller}/{action}/{id}')

Having these is, I think, bad practice as it is better to be explicit and we should therefore remove asap.

In addition I think we should be cautious about 'default' routes in core such as:

    map.connect('/api/rest/:register', controller='api', action='list',
        conditions=dict(method=['GET'])
        )

As it makes it harder for extensions to introduce their own APIs (here one could perhaps add something at /api/rest/{my-object} but only by using before_map rather than after_map).

[rgrp]

fixed in branch:defect-1106-bugs-with-routing.