v0.1.11

Changelog:

• bugfix for init func generator for TStruct.
• bugfix for set constants in parser, via #39.
• add support for "includes" and service "extends", via #37.
• add close() to servers, via #38.
• implement non-strict mode for binary protocol, via #40.
• removed cython ext in pypy, and add pypy3 support.
• some args updates:
  • add trans_factory arg to make_server.
  • rename rbuf_size in buffered transport to buf_size.
  • rename isOpen to is_open, readFrame to read_frame.