Update version strings to 1.5.3

Update version strings to 1.5.2.

mvn versions:set -DgenerateBackupPoms=false -DnewVersion=1.5.2

Update version strings to 1.5.1.

mvn versions:set -DgenerateBackupPoms=false -DnewVersion=1.5.1

Update version strings to 1.5.1-BETA3.

mvn versions:set -DgenerateBackupPoms=false -DnewVersion=1.5.1-BETA2

Update version strings to 1.5.1-BETA2.

mvn versions:set -DgenerateBackupPoms=false -DnewVersion=1.5.1-BETA2

Update version strings to 1.5.1-BETA1.

Mark a 1.5.0 release.

Mark a 1.5.0-BETA3 release.

Mark a 1.5.0-BETA2 release.

Mark a 1.5.0-BETA1 release.