Update all branch pointers to 2.0 branches
Merge pull request #49 from basho/bugfix/lease-default-config

Change default for lease_duration config

Reviewed-by: jtuple

Backport merge of 1d4f8482c13b58c417310997aa1c7ab794f97622
Update dependencies to point to tags for 2.0
Merge branch '2.0' into develop