also make it possible to switch the app store and the knowledgebase off completely.

It´s automatically search in the owncloud folder and in the parent folder.
override with an option in config.php is also possible

add themeing support and support for autoselection of mobile/tablet and standalone css/jss files and templates

Signed-off-by: Florian Pritz <bluewind@xinu.at>

Table prefix is useful where only one DB is possible (cheap hosting).
this way is possible define something like a "namespace"

default is 'oc_'