Duda I/O: adding Duda I/O framework tests.

The following patch adds a web service based on Duda I/O framework,
at the moment only tests #1 and #6 are implemented. For the next round
we will cover Database tests.

For more details about the stack and components please refer to:

  http://duda.io
  http://monkey-project.com

Signed-off-by: Eduardo Silva <eduardo@monkey.io>