v1.9.7

• adds specific "margin" property to .axes( ) (21b5e34)
• fixes displaying custom agg functions in tooltips (closes #510) (fd87481)
• adds mouse axis tooltip to discrete axis (closes #508) (570321e)
• fixes manually overriding time axis ticks and labels (#508) (6cdabba)
• fixes sorting of discrete string axis (closes #502) (004dd27)
• fixes issue with single-entry discrete number axis (closes #485) (dd0b9c7)
• fixes issue with flipping y-axis (4350a7b)
• adds catch to only resize if values have changed (49dcfe0)
• fixes width resizing on small charts (closes #503) (e0d48aa)
• makes the tooltip (short mode) have a configurable max number of children (#488) (b780a17)