Fixed #include order.
Removed un-needed header.
Removed unneeded whitespace.
Removed write access to the computer's processor state.

- The non-const access to the computer's processor state was dangerous,
  since peripheral devices could potentially modify the state without
  ownership and cause races.
Removed free-run mode.

- It was causing outrageous memory leaks and heavy processor
  utilization. I'm not exactly sure why, since the only difference is
  the lack of thread sleeping, but there's no real reason for it anyway.

- The default execution speed is now a frequency of 10 MHz.
Merge branch 'dev' of github.com:hakuch/Dcpu16Universe into dev
Corrected documentation for the processor running speed option.