Use the first path segment to key off config.teamTokenMap, which contains a mapping to teamTokens. The client then behaves as before, keeping the path in the address bar constant with no redirects required.
Now that the RTS contains config for teams, use GET /teams to get that information so that users will see be able to register as a team (but not yet auto-join rooms, be sent to welcome page or be tracked as a referral).
* Implement simple team-based registration
Config required goes in the `teams` top-level property in config.json. This consists of an array of team objects:
```json
{
"name": "University of Bath",
"emailSuffix": "bath.ac.uk"
}
```
These can be selected on registration and require a user to have a certain email address in order to register as part of a team. This is for vector-im/riot-web#2940. The next step would be sending users with emails matching the emailSuffix of a team to the correct welcome page as in vector-im/riot-web#2430.
* Render attachments inside iframes.
* Fix up the image and video views
* Fix m.audio
* Comments, and only use the cross domain renderer if the attachment is encrypted
* Fix whitespace
* Don't decrypt file attachments immediately
* Use https://usercontent.riot.im/v1.html by default
* typos
* Put the config in the React context.
Use it in MFileBody to configure the cross origin renderer URL.
* Call it appConfig in the context
* Return the promises so they don't get dropped
The idea here is to make a layer which sits around for as long as we have a
valid MatrixClient. Also it makes a plausible split for the render of
MatrixChat, even if they are much too tightly bound for now.
Don't use replaceState in MatrixClient: there's lots of stuff in
MatrixClient's state now (including the app version) so replacing
the entire state doesn't really make sense (and also blows away
all of the nice defaults we set in getInitialState). Instead,
setState of the things we actually care about wherever we used
replaceState.
Also add a couple of state variables to getInitialState that were
missing.
Fixes https://github.com/vector-im/vector-web/issues/2322
