Adds basic_ohmpi_flows_node-red. Updates architecture.pdf. Moves mqtt_controller.py in examples and updates it.

Merges changes on both sides on _process_command. Adds cmd_id to exposed functions for in function messaging

Fixes issue #77. Improves args and kwargs handling by _process_command. Reorders method in alphabetical order to ease navigating the code

add screenshot of web interface + rename mqtt listner for http_interface to
avoid conflict with omhpi.py listener

Fixes issue #77. Improves args and kwargs handling by _process_command. Reorders method in alphabetical order to ease navigating the code

- fix passing sequence with new process_commands
- update process_commands as json.loads() parse recursively
- update index.html pseudo-section (+ hover info)
- comment double info log in run_sequence_async
- fix update_settings by adding '_settings' to common cmd_id with set_sequence (from http_interface)

Merges changes on controller. Cleans up exec messages in info mode. Implements a generic _process_commands.