Changes
- Url, add href and rel, deprecate getStatic, fix #231
- Arr, add merge, deprecate replace, fix #228
- View, set engine options, sleet compile fix #288
- Validation, add exists validator #274
- Db, count elements #277
- Router, set routes must be explicitly called #282
- Db, skip settings if not provided, fix #286
- Auth file, fetch users from the options, fix #285
- Sqlite, row count returns zero all the time, fix #283