Awsscripter

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* Respect --dir when loading custom resolvers and hooks.

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* Include Scope in ``update-stack-cs`` output.
* Updates to documentation.

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* Removing deprecation notices.
* Updating documentation.

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* Changing syntax used for resolvers and hooks in config files.
* Deprecating use of ``sceptre_get_template`` function in Troposphere templates.
* Deprecating the accessing of Troposphere templates returned from ``sceptre_get_template``.
* Deprecating the accessing of Troposphere templates from the global variable ``t``.
* Deprecating the global variable ``SCEPTRE_USER_DATA``.
* Adding support for ``sceptre_handler`` function in Troposphere templates.
* Adding support for pure CloudFormation JSON strings returned by ``sceptre_handler``.
* Adding support for ``sceptre_user_data`` passed to ``sceptre_handler``.
* Fixing bug in update-stack-cs.
* Adding project-variables resolver.

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* Adding documentation for CloudFormation Service Role.

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* Updating documentation on hooks.
* Adding support for CloudFormation Service Role.
* Adding support for custom stack names.
* Removing (before|after)_launch hook.
* Changing documentation styling.
* Adding Python 3 support.
* Adding --verbose argument to describe-change-set.
* Adding support for launching stacks without uploading the template to S3.
* Adding a FAQ section on ``parameters`` vs ``sceptre_user_data``.
* Adding support for CloudFormation template written in YAML.
* Bumping boto3 requirement.
* Adding more intuitive delete stack message.
* Removing profile.
* Fixing a multithreading bug.
* Improve CLI UX by printing only an exception's message, not the whole stack trace.
* Adding environment path check.
* Refactoring out code that fetches stack status.