Aws-parallelcluster

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- feature:``cfncluster``: Support for D2 instances
- updates:``ami``: Pulled latest CentOS6 errata
- updates:``ami``: Pulled latest cfncluster-node package
- updates:``ami``: Pulled latest ec2-udev-rules package
- updates:``ami``: Pulled latest NVIDIA driver 346.47
- updates:``ami``: Removed cfncluster-kernel repo and packages
- updates:``ami``: Updated Chef client to 12.2.1 + berkshelf

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- feature:``cli``: Added configure command; easy config setup
- updates:``docs``: Addtional documentation for configuration options
- updates:``ami``: Pulled latest CentOS6 errata
- bugfix:``cfncluster``: Fixed issue with nodewatcher not scaling down

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- updates:``ami``: Custom CentOS 6 kernel repo added, support for >32 vCPUs
- feature:``ami``: Chef 11.x client + berkshelf
- feature:``cfncluster``: Support for S3 based pre/post install scripts
- feature:``cfncluster``: Support for EBS shared directory variable
- feature:``cfncluster``: Support for C4 instances
- feature:``cfncluster``: Support for additional VPC security group
- updates:``ami``: Pulled latest NVIDIA driver 340.65
- feature:``cli``: Added support for version command
- updates:``cli``: Removed unimplemented stop command from CLI

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- updates:``ami``: Pulled latest CentOS errata. Now CentOS 6.6.
- updates:``ami``: Updated SGE to 8.1.6
- updates:``ami``: Updates openlava to latest pull from GitHub
- bugfix:``ami``: Fixed handling of HTTP(S) proxies
- feature:``ami``: Moved sqswatcher and nodewatcher into Python package cfncluster-node

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- feature:``cfncluster``: Support for GovCloud region
- updates:``cli``: Improved error messages parsing config file

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- feature:``cfncluster``: Support for Frankfurt region
- feature:``cli``: status call now outputs CREATE_FAILED messages for stacks in error state
- update:``cli``: Improved tags and extra_parameters on CLI
- bugfix:``cli``: Only check config sanity on calls that mutate stack
- updates:``ami``: Pulled latest CentOS errata