Stacker

- Add docs on config, environments & translators [GH-157]
- locked output changed to debug [GH-159]
- Multi-output parameter doc [GH-160]
- Remove spaces from multi-item parameters [GH-161]
- Remove blueprints & configs in favor of stacker\_blueprints [GH-163]
- Clean up plan/status split [GH-165]
- Allow s3 server side encryption [GH-167]
- Support configurable namespace delimiter [GH-169]
- Support tags as a new top-level keyword [GH-171]
- Update to boto3 [GH-174]
- Interactive AWS Provider [GH-178]
- Add config option for appending to sys.path [GH-179]
- More condensed output [GH-182]
- File loading lookup [GH-185]
- Handle stacks without parameters [GH-193]
- Implement blueprint variables & lookups [GH-194]
- Fix traceback on interactive provider when adding resources [GH-198]
- kms lookup [GH-200]
- Compatible release version dependencies [GH-201]
- add xref lookup [GH-202]
- Update docstrings for consistency [GH-204]
- Add support for CFN Parameter types in Blueprint Variables [GH-206]
- Deal w/ multiprocessing library sharing ssl connections [GH-208]
- Fix issues with slashes inside variable lookups [GH-213]
- Custom validators for blueprint variables [GH-218]

This is a major release with the main change being the removal of the old
Parameters logic in favor of Blueprint Variables and Lookups.

- Add support for resolving variables when calling `dump`[GH-231]
- Remove old Parameters code [GH-232]
- Pass Context & Provider to hooks [GH-233]
- Fix Issue w/ Dump [GH-241]
- Support `allowed_values` within variable definitions [GH-245]
- Fix filehandler lookups with pseudo parameters [GH-247]
- keypair hook update to match route53 update [GH-248]
- Add support for `TroposphereType` [GH-249]
- Allow = in lookup contents [GH-251]
- Add troposphere types [GH-257]
- change capabilities to CAPABILITY\_NAMED\_IAM [GH-262]
- Disable transformation of variables [GH-266]
- Support destroying a subset of stacks [GH-278]
- Update all hooks to use advanced results [GH-285]
- Use sys\_path for hooks and lookups [GH-286]
- Remove last of botocore connections [GH-287]
- Remove --var flag [GH-289]
- Avoid dictionary sharing pollution [GH-293]
- Change aws\_lambda hook handler to use proper parameters [GH-297]
- New `split` lookup handler [GH-302]
- add parse\_user\_data [GH-306]
- Add credential caching [GH-307]
- Require explicit call to `output` lookup [GH-310]
- Convert booleans to strings for CFNTypes [GH-311]
- Add ssmstore as a lookup type [GH-314]
- Added region to the ssm store test client [GH-316]
- Add default lookup [GH-317]
- Clean up errors from variables [GH-319]

- Support destroying subset of stacks [GH-278]
- Update all hooks to use advanced results [GH-285]
- Use sys\_path for hooks and lookups [GH-286]
- Remove last of botocore conns [GH-287]
- Avoid dictionary sharing pollution [GH-293]

- Allow `=` in lookup input [GH-251]
- Add hook for uploading AWS Lambda functions [GH-252]
- Upgrade hard coded capabilities to include named IAM [GH-262]
- Allow hooks to return results that can be looked up later [GH-270]

- Fix an issue w/ boto3 version string not working with older setuptools

- pass context to hooks as a kwarg [GH-234]
- Fix file handler lookups w/ pseudo parameters [GH-239]
- Allow use of later boto3 [GH-253]