Typescript, Simplified api, bug fixes

1. Complete rewrite in typescript.
2. Fix some subtle bugs related to object structure (ie modifiying arrays would sometimes behave unpredictably based on the parent's structure).
3. Remove the need for babel-polyfill
4. Breaking api changes: Simplified minimal api:

• put
• get
• getEdit
• evict

Bug fixes

Fix bug with all siblings in an array being changed when one only one is edited