canvas-redraw: add clip and redraw
canvas-redraw: add noDrawHiddenArea, dragAccelerate and showFPS
canvas-redraw: add drawLastGrid
canvas-redraw: add initOffsetX and judgement for leftmost and rightmost position
canvas-redraw: reconstruct LineChart.js and add currentPoint drawing
canvas-redraw: canvas: add drawCurrentLabel and drawLastLabel
canvas-redraw: canvas: drawCurrentLabel -> drawCurrentValue, drawLastLabel -> drawLastValue
canvas-redraw: canvas: bugfix for data which has only 1 item
canvas-redraw: canvas: add fis support and linechart-aio.js
canvas-redraw: canvas: add fakeDraw to fix bug on Android 4.3 webview; some other updates
canvas-redraw: canvas: add redraw, $.os.ios detect
canvas-redraw: canvas: add labelLastLabelOpacity option
canvas-redraw: add enableShowTail option