Use 'set' things to 'metric' things for lines widget
Rename 'lastvalue' widget to 'last'
Change widget formatter names to look closer to d3's formatter names (eg, 'tickFormat' instead of 'ftick')
Merge branch 'develop' into feature/issue-19-fix-api-inconsistencies
Merge branch 'feature/issue-19-fix-api-inconsistencies' into develop
Build