wabac.js 2.16.0

Major changes

Refactor loading of WACZ files to support automated updates for MultiWACZ, including re-authentication

What's Changed

• WACZ loading refactor + support nested WACZ + MultiWACZ updating by @ikreymer in #115
• revisit dupe check: optimized revisit filtering by @ikreymer in #116
• parsing fixes: by @ikreymer in #117
• wacz loading: treat missing profiles as default single-wacz by @ikreymer in #118

Full Changelog: v.2.15.5...v2.16.0