added new extension test 

test to proof that no other field is changed if one extension field is
updated
[release] bumbing versions after release
Merge pull request #80 from davidmoebius/extension_update_test

added new extension test
adjusted jetty in pom.cml
Merge pull request #82 from davidmoebius/jetty_pom

adjusted jetty in pom.cml
added tests for blowing up headers
Merge pull request #83 from davidmoebius/BT-29

added tests for blowing up headers
[release] updated version
[release] updated versions before release
Merge pull request #84 from osiam/develop

Release