Configuration is now possible via cli arguments, so it is no longer
necessary to include my personal configuration.

Renames PullBlock to PollBlock and moves it to the SignalBlock in
QBar.BlockHelper.
The script block is now in linewise mode by default and can be
configured into polling mode with '--poll'.

- PushBlock becomes Block.
- Block and PushBlock differentiate in their Proxy upstream type.
- Exit codes are unified as ExitBlock.