* Adjust I2PTunnelHTTPServer so it can be used for outproxy operators
      (just specify the spoofed host as an empty string), allowing them to
      honor x-i2p-gzip encoding.
    * Let windows users build the exes too (thanks bar and redzara!)
    * Allow I2PTunnel httpserver operators to disable gzip compression on
      individual tunnels with the i2ptunnel.gzip=false client option
      (good idea susi!)