fix&feature:

(1) feature: Add option boxplot.clip
(2) feature: Enable boxplot and candlestick containShape for "value"/"time"/"log" axis, enable proper shadow axisPointer. (candlestick-case.html, boxplot-multi.html)
(3) fix: Fix candlestick ends shapes can not be displayed on "value"/"time" axis. (candlestick-case.html)
(4) fix: candlestick shape width is inappropriate when datazoom filterMode is 'none'/'empty'.  (candlestick-case.html)
(5) fix: In polar coordinate system, support "value"/"time" axis as angle/radius axis, enable propere bandWidth for bar series, enable proper shadow axisPointer. (bar-polar-multi-series-radial.html, bar-polar-multi-series.html)