Handle commands with spaces when using Controller

[chuckremes]

I missed a use-case when first designing the MVC classes. Sometimes people design commands like this:

class Agent < SlackRubyBot::Bot
  command 'run some command' do |*args|
    ...
  end
end

If someone sent a command with spaces to the controller it would fail to match any known method.

So, the Controller class was augmented to support this. Any method names that contain embedded underscores '_' will now generate a command matcher with spaces. When that command matches a route and we try to call the corresponding controller method, the command is downcased and converted to a method_name_with_spaces.

[dblock]

This is a fairly poor choice of variable name, method_name vs. meth_name, just make it m.