3.1.0

• [^] Animation more robust for NaN value
• [^] VML improvement on arc drawing
• [^] Vertical align improvement when using some font like Microsoft Yahei.

3.0.9

• [+] Add Displayable#useStyle method to reset whole style object.
• [+] BezierCurve add tangentAt method.
• [^] Fix zero angle arc draw error on IE8.
• [^] Color gradient can be a plain object. Different path do not share canvas gradient instances.

3.0.8

• [^] Group add silent property
• [^] Fix VML dynamic path draw bug

3.0.7

• [^] Fix IE8 in some case circle can't draw

3.0.6

• [^] Fix bug of bounding box always been calculated
• [^] Fix numerical error when calculating bounding box of curve.
• [^] Fix vml painter

3.0.5

• [^] Quadratic curve winding bug fix in path

3.0.4

• Add textVerticalAlign for multiple lines text
• Fix mousewheel event on firefox
• Fix ignore bug in VML

3.0.3

• [^] Expose Handler#findHover
• [^] Fix bug in IE8 when text has percent position
• [^] Mouse position fix in IE8

3.0.2

• [^] Fix mouseevent on surface tablet.
• [^] Optimize hover for path with both stroke and fill.
• [^] IE8 Optimize

3.0.1

• Arc and sectors radius < 0 bug fix，Fix apache/echarts#2431
• Zero length arc winding fix