Monkey: new v1.5.6 release.

This patch add the new Monkey HTTP Server v1.5.6.

For more details about software changes please visit:

    http://monkey-project.com/Announcements/v1.5.6



=== Build Tests ==

 This version have been tested on Yocto/Dizzy based on RPM.

 monkey-yocto/5aee7684cd66f78fb51f78138603a4dde4ef2484

Signed-off-by: Eduardo Silva <eduardo@monkey.io>
Signed-off-by: Martin Jansa <Martin.Jansa@gmail.com>