8.2.8 add register action
Add dotinstall d3.js
* styleの書き方
* 設定値に関数を利用できる
#05 append/remove
#06 data
#06-08 update, enter, exit
#09,10 svg
#11 svg animation
#12 each with animation
rename from svg.html to svg_animation.html
#13 on events
#14 bar chart
#15 scale/nice
#16 axis
#17 axis padding