Finished release v0.1.1.

* release/v0.1.1:
  TRIVIAL fixing AttributeError
  buildout.cfg: adding infi.nose_logbook to requirements (dev)
  TRIVIAL fixing exception raising in ImmediateResult
  TRIVIAL adding a test
  TRIVIAL another format for InternalServerError
  TRIVIAL now encoding the internal server error with encode_rpc_result_exception
  TRIVIAL converting non-rpc-friendly exceptions to internal server error
  TRIVIAL fixing the ipython mixin
  buildout.cfg: changed isolated python version to v2.7.6.20
  buildout.cfg: changed isolated python version to v2.7.6.19