* Update mbtiles.js
* some reading
* remove seemingly unused/dead code
* core api functionality
* test note
* grids
* remove index test
* add tilelive example
* vNext
* follow sqlite3 URI filenames
* add mode test
* add mode test
* fix ci
* fix ci
* Update mbtiles.js
* follow sqlite3 URI filenames
* add mode test
* add mode test
* fix ci
* fix ci
* Update readme on mode flags