Started to write the core and node functions
Finished core init function
OSAL slightly reworked.Interfaces enhanced.Documentation updated.
updated all file headers to 2019
introduced some fundamental files:- urt_types.h defines several fundamental types of µRtWare- urtware.h is the main header to be included when using µRtWare- urt_confcheck.h is a helper to check the µRtWare configuration