Door overview
Door is an entry point to the MacroServer. Door exposes an interface to run macros and interact with macro currently being run.
A single Macro Server can have many active Doors at the same time but a Door can only run one macro at a time. Each Door is exposed on the sardana server as a Tango device.
Exist a possibility to define macro environment applied at the door level i.e. not visible on other doors.