Release 2.0.0

Changes since 1.0.0:

• Use a pipe instead of an eventfd on non-Linux platforms, so it might work
  on other kernels.
• Proper command line argument parsing - pass --help to see the available
  options.
• Optimized startup.
• Added an option to make the process a system process under Wine.
  This doesn't do anything anymore since conhost got added to Wine, but it
  used to function like the service mode, where the process would not block
  prefix shutdown.
• The process priority is now automatically lowered to "Below Normal".
• The executable was split into two parts, a .exe and a .dll.so, to separate
  the Windows and *nix parts.
• The service mode got fixed - Wine now waits for the proxy to finish starting
  up before running anything else.
• Many other small fixes and improvements. Look at the commit log to see the
  boring details.