[xmlunit/xmlunit] 09315d: prepare 2.4.0 release

[GitHub <no...@gi...>]

  Branch: refs/tags/v2.4.0
  Home:   https://github.com/xmlunit/xmlunit
  Commit: 09315dc265ded8bcf9d8a795abdca7920611ff43
      https://github.com/xmlunit/xmlunit/commit/09315dc265ded8bcf9d8a795abdca7920611ff43
  Author: Stefan Bodewig <ste...@fr...>
  Date:   2017-07-23 (Sun, 23 Jul 2017)

  Changed paths:
    M RELEASE_NOTES.md
    M pom.xml
    M xmlunit-core/pom.xml
    M xmlunit-legacy/pom.xml
    M xmlunit-matchers/pom.xml

  Log Message:
  -----------
  prepare 2.4.0 release