Support for OCI Cloud Controller Manager and Flexvolume plugins, GPU scheduling, and Kubernetes 1.7.9

Changes from previous release:

• Integration with OCI Cloud Controller Manager (CCM)
• Integration with OCI Flexvolume Driver
• Support for scheduling OCI GPU infrastructure on cluster worker nodes
• Improved documentation and example operations
• Added ability to mount docker and etcd data to persistent block volumes
• Updated the default Kubernetes version from 1.7.4 to 1.7.9 (1.8.5 also verified)
• Added input variables for overriding VCN CIDR block and changing the overlay network backend
• Number of other bug-fixes

Support for private clusters, make etcd LB optional, various other options and bug-fixes

Changes from previous release:

• Add variable to control whether instances, subnets, lbs are public (default) or private (#15)
• Add variable support to allow disabling the etcd load balancer (#32)
• Add variable to control docker log configuration (#39)
• Add tentative support for Kubernetes 1.8 (#52)
• Add variable to set a docker device file for a faster filesystem (#51)
• Reorganize and expand documentation
• Number of bug-fixes

Support Oracle Linux, shell script cleanup

Changes from previous release:

• Support Oracle Linux (#3)
• Minor fixes to bootstrap scripts and README

Initial release

This is the initial release of the Terraform Kubernetes Installer for the Oracle Cloud Infrastructure.