Add storage to fulltext search on location and comments

Issue #614

Signed-off-by: Michal Čihař <michal@cihar.com>
Update location/comment fulltext index on update

Issue #614

Signed-off-by: Michal Čihař <michal@cihar.com>
Implement fulltext searching on location and comment

Issue #614

Signed-off-by: Michal Čihař <michal@cihar.com>