Squashed commit of the following:

commit dbb7005aa866cdc337bde9c8169e9bf15e5c8042
Author: dz0ny <dz0ny@ubuntu.si>
Date:   Sun May 11 22:12:58 2014 +0200

    Fix: Make PR mergable

commit 5bb27da72c4276a930bf33955e6583f6781d23f6
Author: dz0ny <dz0ny@ubuntu.si>
Date:   Thu May 8 23:31:54 2014 +0200

    Add: helper method for extensin url

commit 8a348b26b65102084a606ff73384a478bb785cf1
Author: dz0ny <dz0ny@ubuntu.si>
Date:   Thu May 8 00:35:50 2014 +0200

    Add: Refactor ws and rpc to handlers, reuse code

commit 677c809d2b39a6c982ab835368fdb8a3ad9d1a92
Author: dz0ny <dz0ny@ubuntu.si>
Date:   Thu May 8 00:18:10 2014 +0200

    Fix: Return proper HTTP headers

commit fe5fea2fc2a0d28a39532d6d4cd2b21013d57d24
Author: dz0ny <dz0ny@ubuntu.si>
Date:   Wed May 7 23:48:19 2014 +0200

    Add: RPC post handler
    Add: tests for http post handler

commit e77e60310853b368758b09b303a96a95ff1b9b93
Author: dz0ny <dz0ny@ubuntu.si>
Date:   Sun May 4 22:15:04 2014 +0200

    Add: Documentation on how to extend http api

commit a3a14fb5d15f095e5bab23a590e0a8360a039f9a
Author: dz0ny <dz0ny@ubuntu.si>
Date:   Sun May 4 19:48:34 2014 +0200

    Add: HTTP tests for default router and static handler

commit 0d9544256bcb8f048eaedb5cdd57b1de027d387b
Author: dz0ny <dz0ny@ubuntu.si>
Date:   Sun May 4 15:44:32 2014 +0200

    Fix: Move StaticFileHandler to main http package

commit c83c9f661e658e4a843dc5c8c6ba5dc3f1ea9c1e
Author: dz0ny <dz0ny@ubuntu.si>
Date:   Sun May 4 15:29:49 2014 +0200

    Add: default Router implementation

commit 258cb7210bdf13833884c04cfb7fb4fa704394a7
Author: dz0ny <dz0ny@ubuntu.si>
Date:   Sun May 4 15:00:46 2014 +0200

    Add: Switch to registry for router registration

commit b7bfe7b814235b030d7ac30de90e2331e3d809d3
Author: dz0ny <dz0ny@ubuntu.si>
Date:   Sat May 3 21:52:58 2014 +0200

    Fix: Private methods
    Fix: Point to mopidy.html instead main.html
    Fix: Less noise in console

commit 232abe3029e93f78ce25db0c1bd44743cc23ed2d
Author: dz0ny <dz0ny@ubuntu.si>
Date:   Sat May 3 21:32:07 2014 +0200

    Fix: Start IOLoop in separate thread, so actor can stop it

commit d686892c2fa993cbedc99c8e8e7f9c961ac6f35a
Author: dz0ny <dz0ny@ubuntu.si>
Date:   Sat May 3 19:30:49 2014 +0200

    Fix: Router load order
    Fix: JS helper library WSS default url
    Add: Handlers from extensions

commit a1b0f5673a6719f229df27feccb284324675e9d1
Author: dz0ny <dz0ny@ubuntu.si>
Date:   Sat May 3 14:53:30 2014 +0200

    Add: Switch to Tornado framework
Fix: Import order for whole PR
Fix: Fields order doesn't matter for json. Test for valid dict and data only
Add: Tornado as required dependency
Fix: Remove draft76
Fix: Remove class attributes for ws handler
Revert: default to /ws/ for for mopidy.html
Fix: revert removal of extras_requires
Merge branch 'dz0ny/tornado_http' into develop
setup: No reason to be too specific with the Tornado version
docs: Improve HTTP extension docs
http: Use single quotes
http: Import modules, not variables
http: Improve Router docstrings, include in API docs
http: Fix bad merge that reverted PR#725
http: Formatting
setup: Fix typo in extras_require
setup: http ext no longer require http extras
docs: Update changelog