WIP: working on metadata-dependent ami
Refactoring:
- ami generates userscript using only metadata and dist/bundle names;
- now `AbstractAMI` has `MetadataBound` type member;
- distribution should have metadata, which conforms to it's ami's `MetadataBound`;
Bumped the version
Fixed how names are passed to the userscript
Fixed tests; updated docs
Removed statika version from the metadata
Updated docs
Moved to the new era7-sbt-release plugin
Merge branch 'feature/metadata-dependent-ami'