Support to disable modules modules / modules methods per channel

[lenisko]

Ability to disable modules or even methods inside chosen modules for channel name using default configuration file.

In this example we are disabling modules / modules methods on #example channel.
disable_modules is used to completely disable provided modules on channel for example choice, weather won't respond at all.

disable_commands is used to disable methods from provided modules for example event_watcher from url module which means all other methods should work (unless disabled are needed).

Adding other channel excludes is as simple as adding another section named like channel.

...

[#example]
disable_modules = choice,weather
disable_commands = {"url": ["event_watcher"]}

[lenisko]

ah sorry, by mistake I have also added help.py change in this PR. I'll close old one then #1227

[dgw]

That'll happen if you open pull requests from your default branch. :)

[lenisko]

I'll push it one more time

[dgw]

Note from the future: This was replaced by #1235.