Fixes #5409: Adds visible :focus styles for nearly every link/input
Allow :focus to match buttons as well as anchors
Darker outline on rss/bookmark
Fixes #5418 adds enabled clause for annotations
not sure what a flush() is doing there
Fixes #5146 adds upgrade service
Fixes #5435: Allows upgrade to boot on old schemas
Merge pull request #5436 from mrclay/5435

Fixes #5435: Allows upgrade to boot on old schemas
Merge pull request #5444 from Srokap/develop

Removing trailing ?>
added database queue
ported notifications code to use DIC with service class
updated documentation for notifications service factory
updated documentation for coding standards
added more documentation
made the documentation plugin developer friendly
added an example of messages providing a site delivery method and bookmarks adding a notification event
not depending on global state in notifications service
pulled hooks out as dependency
added more unit tests
reorg to accomodate a SubscriptionsService