1.3.0

Changed

• Allow to use a non-standard socket (for example, sslsocket with TLS
  support).
• When processing a GET request, the plus sign in the parameter name and
  value is now replaced with a space. In order to explicitly pass a "+"
  sign it must be represented as "%2B".

Added

• Add option to control keepalive connection state (#137).
• Add option to control idle connections (#137).