- renaming cont_name and cont_image to container_name and
container_image.
- cont_id is now a field, called container_id
- docker_cpu, docker_mem, docker_net measurements have been renamed to
  docker_container_cpu, docker_container_mem, and docker_container_net

closes #1014
closes #1052

closes #1023
closes #921

closes #995

mongodb readme and examples

closes #1039

closes #706

closes #681
closes #1009

closes #958

closes #925
closes #879

closes #998

so remove it as a dependency from the linux packages.

closes #974

Adding few metrics example in jolokia plugin

closes #993

Adding more metrics in example to make it easier to better understand the plugin

closes #991

this might fix #921

see https://github.com/eclipse/paho.mqtt.golang/issues/32

closes #939