For the mentoring sprint on friday @ https://amsterdam2014.drupal.org we'd like to use the dreditor tool plus one of its new pull request feature.
To install this just visit https://dreditor.org/development/build and pick your browser icon from #93 Add support for stock responses (macro/templates). When it states 'Rebase needed' just ping ClemensTolboom @ irc as dreditor is still evolving.
Looking for a HTML range field in Drupal 8 core I did not found one. First I tried to alter Number Widget but that was wrong. Just extend a suitable widget. The code is very short. But the display is not as good as one needs. Where is the min and max value? And the current value? The specs @ w3c html5 forms input range has some user agent rendering which does not give min, max or current value hints.