Merge pull request #38 from nuest/master

Build management update
Merge pull request #39 from nuest/master

Add 52-North as parent pom
Merge pull request #40 from nuest/master

add readme for client
Merge pull request #41 from nuest/master

Move integration tests to own module, move swagger generation into profile
Merge pull request #42 from nuest/master

Add example client project
Update README.md
add error facet; update examples to version 4.0