started evaluation of binary compatibility
further work on binary compatibility
started change tracking of annotations
added .travis.yml
moved execution of surefire plugin to phase integration-test
updated travis build status URL
added output of changed annotations of classes to StdOutputGenerator
added change tracking of annotations to fields and methods/constructors
added further tests for annotations, interface changes are now per default binary compatible
introduced JApiAnnotationElementValue
further work on annotation change tracking
updated travis.yml, removed ClassVisitor, updated README.md