fixed #226 by removing next, slot, and flap elements
Merge pull request #241 from waterbearlang/226_elminate_next

fixed #226 by removing next, slot, and flap elements
Merge branch 'master' of https://github.com/waterbearlang/waterbear into 239_simplify_model
moving plugins to languages
have tests, can now refactor plugins bravely
All JSON blocks present and accounted for (in new languages directory)