port publisher and bookmarklet to bootstrap
Use a button instead of input to submit, use smaller photos
Refactor publisher
use fixture
Merge pull request #4678 from svbergerem/port-publisher-bootstrap

Port publisher and bookmarklet to bootstrap
Fix different button sizes in new publisher
Merge pull request #4844 from svbergerem/new-publisher-fix-button-height

Fix different button sizes in new publisher
Show hovercards in the notification drop-down for users on the same pod
Fix atom feed for reshares of deleted posts.

Propose for fix #4638

Added Changelog line

Added Specs for testing if the reshared origin post is deleted and therefore not shown in the atom feed
Merge branch 'MatrixCrawler-4638-Atom-Feed-Error' into develop
Merge pull request #4843 from svbergerem/4228-hovercards-same-pod

Show hovercards in the notification drop-down for users on the same pod

Conflicts:
	Changelog.md
Introduce message renderer

This new class replaces all existing server side message
rendering helpers and is the new global entry point for such
needs. All models with relevant fields now expose an instance
of MessageRenderer for those. MessageRenderer acts as
gateway between the existing processing solutions for markdown,
mentions and tags and provides a very flexible interface for
all output needs. This makes the API to obtain a message
in a certain format clear. As a result of centralizing the
processing a lot of duplication is eliminated. Centralizing
the message processing also makes it clear where to change
its behaviour, add new representations and what options
are already available.