Deprecate methods that replace browser features

Addresses #213.

This PR removes a few methods that were made redundant by functionality built-in to supported browsers. Please double check the changes -- especially to the doc sources -- and let me know if it looks good to merge.

Changes:
- Removed `F2.parse`
- Removed `F2.stringify`
- Removed `F2.inArray`

FYI, the "Removing" commits below should name the removed method, but it was stripped for some reason.