fix #1790; npm instead of yarn

1.12.0 (#1706)

* 1.12.0

* better exported files example; img 100%

1.11.0 (#1620)

1.10.1 (#1569)

1.10.0 (#1549)

* 1.10.0

* update version badges

* fix Arquero capitalization

* fix release note links

1.9.0 (#1453)

1.8.0 (#1387)

1.7.1 (#1308)

1.7.0 (#1287)

* 1.7.0

* update getting-started images

1.6.0 (#1244)

* fix #1237; null head, header, footer

* 1.6.0