DATAJPA-515 - Prepare release 1.5.2.

Prepare issue branch.
DATAJPA-515 - Prepare release 1.5.2.

Upgraded to Spring Data Commons 1.7.2, Spring Data Build parent 1.3.2. Update pom.xml to use release repository. Update changelog to reflect recent changes / releases. Update version in notice & readme.

Original pull request: #78.