This release has some bug fixes and improvements for backups and for PVCs.

• Cluster will not be set as owner reference for the credentials secret. (2bed433e78564d29ca7387eab99be283f612e836)
• More e2e test for PVCs cleanup, the PVC for pod 0 will not be deleted. (#178 )
• Map mysqlVersion to kown image tags (dcacd6aebec3d29e2b84534ab47c8a217d0788c8, #171 )
• Add a new field .spec.image on the MysqlCluster resource for specifying the image (#171 )
• Ensure sidecar pods limits. (466ce85ec246e9a161f31b11c0380ee0011fc7a8)
• Don't install CRDs when the CRD is already registered. (2a49e6d670495d46a45a7deabce881f4a5b56239)
• Add e2e test for backups and fix recurrent backups (fc7735b9db487b080e823f7c3628a17e4b6d9249, adb093d7e689a210cb09fcdd24b906b4a64ef943)