Adding announcement file for OGM 4.1.0.Beta7
Updating release announcement URL
Adding release files for HV 5.1.3.Final and 5.2.0.Alpha1
Releasing Hibernate Search 5.0.0.Alpha7
Mention rake instead of awestruct direct use in README
 Adding release of Hibernate OGM 4.1.0.Beta8
Fix summary of the release of OGM 4.1.0.Beta8
Releasing Hibernate Search 5.0.0.Beta1