update d3 version
Merge branch 'gh-pages-dev' of github.com:NickQiZhu/dc.js into gh-pages-dev

Conflicts:
	js/dc.js
start v1.4 development
pie slices cap and other title change
improve bar width calculation
improve bar width calculation when zoomed in
rename single selection chart to selectable chart
implement elastic x on row chart
add elasticX on row chart
add auto-redraw to filter function
fix filterAll reset
fix bubble chart coloring issue
[#181] allow turning off mouse zoom
update dc.js to latest v1.4 build