Use statemachine for bots

[stefanhendriks]

Currently the bot is a whole big bunch of if statements. A good way to deal with this is a state machine.

It also makes it way easier to think about the bot and deduce how it behaves. Now it is one big ball of ifs and maybes :/

[stefanhendriks]

+1 for future me

working on #17 makes me wonder how I ever could work with this codebase without a sane state machine...