Duktape 1.x compatible logging framework

The default Duktape.Logger object and the logging related C API calls (duk_log(), duk_log_va()) were removed in Duktape 2.x because they depended on stdout/stderr and were thus a portability issue for some targets (there were also other issues, such as the logging framework not always matching user expectations). This directory contains Duktape 1.x compatible Duktape.Logger object and logging API calls:

• Add duk_logging.c to list of C sources to compile.

• Ensure duk_logging.h is in the include path.

• Include the extra header in calling code and initialize the bindings:

  #include "duktape.h"
  #include "duk_logging.h"
  
  /* After initializing the Duktape heap or when creating a new
   * thread with a new global environment:
   */
  duk_logging_init(ctx, 0 /*flags*/);
  

  See duk_logging.h for available flags.

• After these steps, Duktape.Logger will be registered to the Duktape object and is ready to use.

See https://github.com/svaarala/duktape/blob/master/doc/logging.rst and http://wiki.duktape.org/HowtoLogging.html for more information on the logging framework design and functionality.