Cache: Created provider base class.
Cache: Created initial file provider class.
Renamed CacheHandler to Cache.
Cache: Removed database manager and initialization SQL.
Cache: Provider base: Changed function names to camel case.
Cache: Implemented file system cache.
Cache manager: Changed to use providers.
Changed default value to system config.
Main index file: Use cache namespace.
Main index file: Removed bad require_once function call.
Cache: Include missing imports.
Cache: File provider: Fixed syntax error.
Cache: File provider: Fixed syntax error in function definitions.
Cache: File provider: Properly return value from isCached.
Cache: File provider: Import missing interface file.
Cache: Moved require command to manager file.
Cache: Base provider class: Removed abstract definitions.
Cache manager: Check if provider is valid before calling isCached.
Cache manager: Specify UID when calling isCached.
Cache: File provider: Import global variable.