Aggregated pull requests (with pull request 62)

It aggregates:

*  https://github.com/novus/nvd3/pull/62 Fix on severval bugs and typos
* https://github.com/novus/nvd3/pull/40 Fix bug of updateFisheye when you filtered out some data
* https://github.com/novus/nvd3/pull/23 Adjust tickLabel's on update rather than enter
* https://github.com/novus/nvd3/pull/21 Add variable for customization of donut pie chart
* https://github.com/novus/nvd3/pull/15 Adding d3.event to scatter event listeners
* https://github.com/novus/nvd3/pull/13 added lineTimeSeriesChart
* https://github.com/novus/nvd3/pull/9 Allow forceY on multiChart
* https://github.com/novus/nvd3/pull/6 Fixed rotateLabels option for multiBarCharts