This implementation does not include yet the possibility to declare 2
exclusive instances on a same port (WR & HA)
- Some structures are renamed with the suffix _t to make it more
readable.
- Some variables are renamed  to be more clear
- Implementation of masterOnly, slaveOnly and externalPortConfiguration
- All extension specific includes (XX-api.h) is now automatically
included in ppsi.h and do not need to be included in other files.