Add two new items in module's dependency:
- recommends: a recommended module tells the sorting algo that if the module is found, it should be sorted accordingly. It is useful for optional dependencies, like shell or mission in some modules
- suggests: if a functionality is not provided by the user, a module can suggest a list of modules that can provide them. It is a convenient way to have "default" modules.
As a result the former autoload node is removed and replaced by suggested modules.
Only one module (sys_mon) used - it will automatically detect if it is rtos, sim or bare-metal and will send the proper message (RTOS_MON or SYS_MON). Easier to use because the user don't have to change between sys_mon and rtos_mon anymore.
Plus added support for CPU load on SIM targets
modules developpers can provide
- a description of the module
- a list of the configuration variables and flags (configure and define)
- a list of sections to add to the airframe file