* develop:
wercker.yml: rewritten
wercker.yml: added
travis-ci: remove defensive checks
shippable.yml: added
travis-ci: only deploy from Travis-CI
KCR37+38: MoveVariableInsideIf: avoid unused private methods
KCR39: regressions: MoveVariableInsideIf: method(): use parameter
KCR38: regressions: MoveVariableInsideIf: valid(): use explicit scope
KCR37: regressions: MoveVariableInsideIf: invalid(): use explicit scope
KXR36: plugin: DefaultCheckstyleExecutorTest: artifactFile: make local variable
builder: ReadmeWriterTest: templateProperties: make local variable
KCR35: builder: ReadmeWriterTest: fragments: make local variable
KCR34: builder: ReadmeWriterTest: template: make local variable
KCR33: builder: ReadmeWriterTest: outputProperties: make local
KCR31: builder: DefaultRuleReadmeLoaderTest: make field local
KCr30: CheckstyleWriterTest: checkstyleTemplate: make field local variable
KCR28: builder: remove empty test class
builder: CheckstyleWriter: avoid throwing raw exception types