- Add opts.js (Lauri Rooden)

Removed Features:

 - test: Remove `null === undefined` from _deepEqual (Lauri Rooden)
 - test: Remove unrolling object in test table (Lauri Rooden)
 - test: Remove array option from `own` (Lauri Rooden)
 - build: Accept `drop` from following siblings (Lauri Rooden)

Enhancements:
 - Add badges to Readme (Lauri Rooden)
 - Add tests (Lauri Rooden)
 - build: Copy css resources to outDir (Lauri Rooden)
 - v8: Use setFlagsFromString for --allow_natives_syntax (Lauri Rooden)
 - test: Accept filename in uncovered option (Lauri Rooden)
 - coverage: Merge duplicated branches (Lauri Rooden)