changing copyright in Virtuoso-Adapater
Merge branch 'develop' of github.com:AKSW/Erfurt into develop
adding a ResourcePool to be used for reusing resources that have been fetched before
Merge branch 'develop' into feature/skyrocketingSpeedup
Merge branch 'develop' into feature/skyrocketingSpeedup
cleanup Resource class
Adapting class ResourcePool to the naming convention Resource_Pool
Changing the call in App.php accordingly
cleaning up both files
Adding getPredicates to the Memory Model class
refactor getDescription into store

The getDescription method is now cached with the objectCache
It is moved to the store and called from Rdf_Resource
options are use_ac (maxDepth and fetchInverse will follow)
fix missing AC check for getModel
ASK Queries will be loaded from cache now
use user URI for cacheID creation
caching allowedModels and ModelType locally in Store class
add 'fetchInverse' option for getDescription
fix missing variable warning
Model_Type_RDFS have to be used with self
Merge branch 'develop' into feature/skyrocketingSpeedup
supporting now correct invalidation of DeleteMatchingStatements
cleanup QueryCache Frontend and Database backend
removing String to Array conversion while invalidate