Merge pull request RaspberryPiFoundation#2289 from google/rc/Feb_19

Rc/feb 19

Bump version number on master

Merge pull request RaspberryPiFoundation#2106 from rachel-fenichel/no…

…vember_rebuild

Rebuild to include blockToDom fix; bump version number

Merge pull request RaspberryPiFoundation#2095 from google/rc/Oct_18

October 2018 release

Merge pull request RaspberryPiFoundation#2042 from google/rc/sept_2018

September 2018 patch release

Merge branch 'master' into rc/august_2018