Dispatch I/O or long computations

[kqr]

phonenicz needs a way to dispatch I/O or long computations (like markov) into parallell processes while the main thread keeps running. Preferably, the main thread should never wait for the I/O or computation to finish. (E.g. if memery wants to get a new markov sentence to say while the sentences are being generated, she shouldn't wait for them to be done.)