Ordered commands

[gconklin]

My attempt at addressing #75 -- probably not the most ruby way to do it but is working for my purposes; comments welcome.

[dblock]

It's an interesting solution. However I think it would be simpler to keep a global list of commands when inherited and not rely on dynamically accessing SlackRubyBot::Commands::Base.descendants.

I would start by writing a test :)

[gconklin]

I am king of Interesting Solutions(tm). I will start by writing a test! as i should have.

[dblock]

Just noticing this @gconklin, merging.

[dblock]

This caused #113. I fixed it in a straightforward way in #114, but I am not sure it's the right way. Would appreciate a second pair of eyes from @gconklin, please.

[gconklin]

I spent some time looking. It does clearly fix #113, but after a bit of Googling, I'm still not entirely sure why @command_classes is different from SlackRubyBot::Commands::Base.command_classes in the context of self. I expect it's my failure to grasp class instance variables, and that @command_classes is different when the test bot inherits from SlackRubyBot::Bot as opposed to a command directly inheriting from SlackRubyBot::Commands::Base
@dblock

[dblock]

I couldn't figure it out either, no worries.