Finished some todos in functions of the core(mutex lock, broadcast control event, increment/check node's stage value)
Started to write the core and node functions
Finished core init function
Started to write the init functions
Started to fill the doxygen
Finished header, added empty functions in c classes, added comments
started the simple skeleton of the urtware
Added header file for the subscriber and basic c class for the nrt subscriber
Initial documentation of the µRtWare project.