[Owncloud] Warning: changed column names in refactoring branch

[Jakob Sack]

BRANCH REFACTORING ONLY:

Hello,

in order to support sqlite, mysql and postgresql at once I had to change some 
column names in the database tables. You'll find the changes in 
d70dfbdebba6070368d1c8999a311dcfc81dec1d.
Basically the following columns changed:

appconfig.key => appconfig.configkey
appconfig.value => appconfig.configvalue
preferences.key => preferences.configkey
preferences.value => preferences.configvalue
log.timestamp => log.moment

Have fun fixing your tables,

Jakob