[sql] Tokens: use TIMESTAMP not DATETIME
[views+js] conference: remove unused owernlist code

Having that would lead to errors in case the currently logged in
user is not a admin or an conference owner
[service] Conference: listWithA..: Fix to join abstract owner

Not conference owner.
[service] Abstract: getOwn: also return abs. for conf. owners
[views] submission: minor style changes (to button and h4)
Merge pull request #105 from gicmo/cleanupFixes

Various cleanup fixes, to SQL (use TIMESTAMP), Abstract + Conference Service and Conference view

OK