update README so port number in examples match
update README so port number in examples match

the example's start the api server on port 8080 make the curl examples
also connect to port 8080 for consistency.

heftyy/nagios-api,Webtrends/nagios-api,al4/nagios-api,numkem/nagios-api,Wikia/nagios-api,Webtrends/nagios-api,Wikia/nagios-api,zorkian/nagios-api,numkem/nagios-api,heftyy/nagios-api,zorkian/nagios-api,al4/nagios-api