Changed example AMS ports to 801, default PLC port.
AdsApi: only port close can close connections.
We can't disconnect in the middle after some function.
updated license headers
corrected AmsNetId name available names (there were 2)
AdsDEF: syncronized with the definitios from Gerhard Schiller's work and organization
Using AdsApi must incude adsdef.h and adsapi.h.
AdsDEF.h syncronized more definitions. Remaining the notification part.
ads.c updated helper function that translates ads error codes to char *.
ads.c missing harmless messaging to syslog.
ads.h ... syncronized with new work.
AdsDEF.h inclusion is independent from ads.h.
must be called before ads.h.