1.9.0-RC1

Release created via ./buildscripts/git-release

Changes since 1.8.0:

• chore(travis): updating travis file according to new release format (#60) (3b4998b) (@mynktl)
• feat(cstorBackup, delete): support for snapshot deletion (#57) (1cd8f21) (@mynktl)
• feat(s3, partSize) : support for multiPartChunkSize (#55) (be88acc) (@mynktl)
• feat(snapshot,restore): support for local snapshot (#53) (3e46633) (@mynktl)