more predictable routes

[mixmix]

the routes for the viewer API are currently a bit hectic. I think they could be organised more clearly. Something like

Proposed              Current
=================     ==================

/thread/:id           /msg/%:id
/hashtag/:hashtag     /tag/:tagName

/blob/:blobId         /blob/:blobId

/feed                 /get-profiles
/feed/:id             /profile-by-id/:id
/feed/:id/counts      /counts-by-id/:id
/feed/:id/threads     /feed-by-id/:id

/user/:name           /profile/:username
/user/:name/counts    /counts/:username
/user/:name/threads   /feed/:userName

?                     /default

[mixmix]

I'd be very interested which APIs are currently used

• what is /default ?
• do we need the user/ username ones?