Reuse the captcha client rather than creating a new one for each request

Older versions of SQLite don't like IF NOT EXISTS in virtual tables

Merge pull request #415 from matrix-org/daniel/endpoints

Merge pull request #418 from matrix-org/daniel/whois

Fix schema delta 15 on postgres

Make state updates in the C+S API idempotent

Search: Add prefix matching support

Only fire user_joined_room if the user has actually joined.

Reuse a single http client, rather than creating new ones

Change the m.room.message rule to be disabled by default

Change the m.room.message rule to be disabled by default so we only notify for 1:1 rooms / highlights out-of-the-box

Conflicts:
	synapse/handlers/federation.py
	synapse/handlers/room.py

Develop

Wrap calls to distributor.fire in appropriately named functions 

Search: Don't disregard grouping info in pagination tokens

various fixes - thanks to Mark White for pointing out you need to run synapse before you try to register a new user

Wrap calls to distributor.fire in appropriately named functions so that static analysis can work out want is calling what