0.4.0

Changes:

* ability to apply desired state with use of the current on
* ability to watch changes with the following automatic apply
* add complete Multus CNI example with automatic updates
* --wait renamed to --pause
* shellcheck target in Makefile
* keep specified order when installing assets
* uninstall in reverse order
* kubectl binary is removed from Docker image (should be mounted from host)
* fix crash that occurs trying to deploy already deployed K8s object.