Bridges no longer require implementation for getName() and getURI()
as they are now implemented with default behavior in BridgeAbstract.
This was previously implemented only for RSSExpander and is now part
of BridgeAbstract (automatically inherited).
Documentation is updated accordingly.
BridgeAbstract will return 3600 seconds by default, so the function
can be removed from any bridge implementing getCacheDuration
returning the same value.
Documentation updated accordingly.
