:arrow_down: UI themes so we can iron out selector issues

Signed-off-by: Max Brunsfeld <maxbrunsfeld@gmail.com>
Prepare 0.153.0 release
Merge pull request #4264 from atom/bo-messages

Messages API implementation
:arrow_up: autocomplete@0.33.1
Fix ordering of panels in panel containers

An off-by-one error caused new panels to be inserted later
in the document than intended.
Merge pull request #4309 from atom/mb-fix-panel-order

Fix ordering of panels in panel containers
Use atom.notifications when there is a config file error
Trigger a notification when there is a keymap issue
:lipstick: on message
Add notifications package as a dependency
Upgrade notifications to remove menus, and fix styling
Fix Notification::getDetail
Add a @font-family-monospace
Upgrade snippets to display a notification

when there is a parse error