Assign anonymous pours to 'guest' user.

Part of issue #204.
Updated Celery instructions.
Overhauled user detail in KegAdmin

Added ability for superuser  to change e-mail address
Merge pull request #209 from theguardian/mod-user-email

Overhauled user detail in KegAdmin
docs: Add troubleshooting section.

Closes #169 and #182.
Created system tweet form

Closes #208
Merge pull request #211 from theguardian/tweet-test

Create system tweet form.
Add FlowToggle support.

Relays are now called "toggles" (since they might not
be relays in all cases) and are now first-class resources. 

Part of issue #184.
Minimal Controller admin.

Part of issue #184.
api: Scope URLs with version number.

Default to /v1 for now.
api: Update status response.
stats: Fix sessions_count.

Closes #201.
Tolerate missing relay names in migration.
Manipulate meters/toggles for existing controllers

Closes #184
Merge pull request #215 from theguardian/admin-controller

Manipulate meters/toggles for existing controllers
Added unit conversion to forms for initializing kegs
v0.9.17
Save modified guest in migration.

Part of issue #220.
Add configurable sort order for taps.

Primitive admin interface (form) right now, good opportunity
for some drag-and-drop JS magic.

Part of issue #223.
v0.9.18