[sheepdog] [ANNOUNCE] sheepdog stable release v0.7.5-rc0

[Hitoshi Mitake]

Hi sheepdog users and developers,

I released v0.7.5-rc0 of stable branch. You can download a source
archive from these URLs:
tar.gz: https://github.com/sheepdog/sheepdog/archive/v0.7.5-rc0.tar.gz
zip: https://github.com/sheepdog/sheepdog/archive/v0.7.5-rc0.zip

The main problem this update solves is that there is a possibility of
invalid vdi deletion by "dog vdi restore".

If no one disagrees about this release in 2 days, it will be v0.7.5
officialy.

Below is the summary of commits this update contains:

Hitoshi Mitake (2):
      tests/functional: update 041 for a case of restoring to non-existing snapshot
      dog: check existence of specified snapshot in vdi_restore()

Liu Yuan (1):
      sheep: return default copy number as formated

Ryusuke Konishi (1):
      dog: fix return value of vdi_backup()


Thanks,
Hitoshi