bump version

Fix bug where state cache used lots of memory

The state cache bases its size on the sum of the size of entries. The
size of the entry is calculated once on insertion, so it is important
that the size of entries does not change.

The DictionaryCache modified the entries size, which caused the state
cache to incorrectly think it was smaller than it actually was.

CONTRIBUTING.rst: fix CI info

Update purge_history_api.rst

Doc: Make the event_creator routes regex a code block

clarify that `purge_history` will not purge state

All the others are code blocks, so this one should be to (currently it is a blockquote).

Signed-off-by: Travis Ralston <travpc@gmail.com>

clean formatting

WIP, need to add most recent PRs

Register membership/state servlets in event_creator

Implement RoomMemberWorkerHandler

Only update remote profile cache on master

Split up ProfileStore

_remote_join and co take a requester