Removes htmlpurifier cache paths from dist config files. Updates to readme.
Only adds user as global twig variable if user is authenticated.
Fixes incorrect property setter on Talk entity.
Removes background image reference in css.
Fixes call to mapper to delete a talk in TalkController.
Fixes invalid call to obtain user identifier.
Merge pull request #141 from mdwheele/bugfix-edit-speaker-profile

Fixes invalid call to obtain user identifier.
Merge pull request #140 from mdwheele/bugfix-delete-talk

Fixes call to mapper to delete a talk in TalkController.
Merge pull request #137 from mdwheele/bugfix-admin-selects-talk

Bugfix admin selects talk
Merge pull request #136 from mdwheele/bugfix-twig-user-global

Only adds user as global twig variable if user is authenticated.
Merge pull request #135 from mdwheele/cache-config-cleanup

Additional cleanup from centralized cache