Enhanced the #include tree. 'amiroos.h' is now the central header, which includes all dependencies.
Applied a file structure template to all source files.
Changed all header guards so they will not use unserscores as pre- and postfix.
Introduced a macro AOS_IOEVENT_FLAG() in aos_types.h.This macro acts similar to EVENT_MASK() and should help to simplify development.The new macro was applied to existing code wherever possible.
updated all file headers to 2019
All contents of the os/ folder has been moved one directory up.