- Clarified ConverterService javadocs
 - Log initialization issue in engine with GAE edition fixed.
   Occurred in production.
 - Added Simple 5.0.4 lbrary
      - Added Request/Response.flushBuffers() method to attempt
        to force network buffers to be flushed out.
        Suggested by Yan Pujante.
      - Internal HTTP connector didn't properly configure the
        socket. Factorized client side logic.
       - Updated Simple HTTP server library to version 5.0.4.
       - Fixed HTTPS issues in internal connector.
 - Minor refactorings and bug fixes in internal connector