1.7.0

8562acf Add debug text for interesting elements (#109)
542bf46 Calculate outer circle radius better (#107)
c828694 Don't redraw tinted target if already drawn (#105)
3c5b8f3 Added onSequenceStep() (#103)
efe5523 Add step listener to sequence listener (#102)
459a3af Fix #98 typo in textTypeface function usage