honor base_command

[spaetz]

The default config and readme mention a base_command to use instead of !gitlab. But it seems that !gitlab is hardwired as base_command. This prevents me from having a Read-only and a RW gitlab plugin running simultanously.

So either base_command should be fixed or removed from the docs/config :-).

[wolfspyre]

This is def a bit confusing.
Is this intended to be configurable, or not?