Aws-parallelcluster

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- feature:``cfncluster``: Support for dynamic placement groups

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- bugfix:``cfncluster-node``: Fix for nodes being disabled when maintain_initial_size is true

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Official release of the CfnCluster 1.x CLI, templates and AMIs. Available in all regions except BJS, with
support for Amazon Linux, CentOS 6 & 7 and Ubuntu 14.04 LTS. All AMIs are built via packer from the CfnCluster
Cookbook project (https://github.com/aws/aws-parallelcluster-cookbook).

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This is a major update for CfnCluster. Boostrapping of the instances has moved from shell scripts into Chef
receipes. Through the use of Chef, there is now wider base OS support, covering Amazon Linux, CentOS 6 & 7
and also Ubuntu. All AMIs are now created using the same receipes. All previously capabilites exisit and the
changes should be non-instrusive.

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- updates:``ami``: Pulled latest CentOS6 errata
- feature:``cfncluster``: Support for specifiying MasterServer and ComputeFleet root volume size
- bugfix:``cfncluster-node``: Fix for SGE parallel job detection
- bugfix:``ami``: Removed ZFS packages
- bugfix:``cfncluster-node``: Fix torque node additon with pbs_server restart
- updates:``ami``: Updated Chef client to 12.4.1 + berkshelf
- bugfix:``cfncluster``: Only count pending jobs with status 'qw' (Kenneth Daily <kmdailygmail.com>)
- bugfix::``cli``: Updated example config file (John Lilley <johnbotcaltech.edu>)
- bugfix::``cli``: Fixed typo on scaling cooldown property (Nelson R Monserrate <MonserrateNelsonJohnDeere.com>)

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- feature:``cfncluster``: Support for dedicated tenancy
- feature:``cfncluster``: Support for customer provided KMS keys (EBS and ephemeral)
- updates:``ami``: Pulled latest CentOS6 errata
- feature:``cfncluster``: Support for M4 instances