Preparing new release (phiz71#100)

* Using Vertx 3.5.1
* git ignore cleaning in samples servers
* adaptation of unit tests for samples servers
* preparation of the new release 1.6.0

Updating versions to release version

Updating versions to release version

Changing version for the next release

improve documentation about generation options

Release 1.1.0 (phiz71#32)

* Error handling (phiz71#23 & phiz71#24) 
** exception generation from swagger file
** adding some checking on http status code

* Custom headers (phiz71#12 & phiz71#28)
** managing headers from eventBus messages
** adding specific header code to manage http response

* Future generation (phiz71#27)
* adding a CLIOption to generate Future<>

* adapatation of Future generation with error handling
* updating version

Merge remote-tracking branch 'origin/master'