Switch karaf 4.1.1 with karaf 4.1.2 in the README.
Switch karaf 4.1.1 with karaf 4.1.2 in the README.

Changes:
 - It's again possible to start the webapp using just maven
 - It's no longer necessary to install the liquibase-core feature separately

steinarb/ukelonn,steinarb/ukelonn,steinarb/ukelonn