Awsscripter

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* Fixing StackStatusColourer: UPDATE_FAILED wan't coloured.
* Fixing bug from uploading templates to S3 from Windows.
* Improving exception thrown when a user tries to use the stack output resolve on a stack with no outputs.

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* Launch now deletes stacks in the CREATE_FAILED or ROLLBACK_COMPLETE states before re-creating them.
* Adding support for Troposphere<1.10.0.

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* Adding support for multiple environments.
* Speeding up integration tests.
* Switching to CircleCI for continuous integration and deployment of documentation.
* Changing template S3 key to use a UTC timestamp rather than seconds since epoch.
* Changing update-stack-cs to delete the change set by default.
* Stopping appending region to template bucket name.
* Refactoring logger.
* Changing exception names from <Name>Exception to <Name>Error.
* Publishing development docs to http://sceptre-dev.ce-tools.cloudreach.com/.

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* Adding support for Troposphere 1.8.
* Adding stack protection support.
* Adding support for allowing Troposphere templates to import modules from parent directories.
* Adding documentation section for IAM role setup.
* Fixing bug in update-wth-cs command.

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* Adding require_version.
* Renaming --machine-readable to --output.
* Refactoring hook.py.

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* Improving logging.