Updating readme and changelog prior to release 5.1.0.CR1
[maven-release-plugin] prepare release 5.1.0.CR1
[maven-release-plugin] prepare for next development iteration
HV-865 Adding explicit null check for destructibleBeanInstance
Preparation for Hibernate Validator 5.1.0.Final release
[maven-release-plugin] prepare release 5.1.0.Final
[maven-release-plugin] prepare for next development iteration
HV-871 Making TypeHelperTest compilable with Java 7 and 8
HV-873 Making sure disallowed tags make validation fail
HV-873 Clarifying scope of @SafeHtml constraint in JavaDocs