Added pkg to .gitignore
Remove unused accessors from Ddr::Extraction
Added basic example usage to README
Bumped version to post-release
Update README.md
Update README.md
Removed unused code
Merge branch 'develop' of https://github.com/duke-libraries/ddr-extraction into develop
Removed unused adapter superclass
Move configuration business to separate class
Straightened out config bits
Bumped version to 0.2.0