Remove the speedlimiter implementation based on resume,suspend calls. this will be implemented on slavebase.

Adds a new interface for containers transfers like metalink. named TransferDataSource.

the idea is to suply data to the container plugin through this interface .

so Multisegkio and bittorrent plugings should implements this interface.

this is the initial commint for this new approach, more will come.

while implementing it on multisegkio.

the interface may change until development, so ideas are welcome