Understandable error messages from uglifyjs
Check if windowResize argument is undefined

When loading nv3d without creating a chart, ```nv.utils.windowResize``` is called somewhere with an undefined argument, so we should check if it is undefined and not try to replace the old event handler, otherwise every resize event generates an error because ```fun``` is undefined.

I was able to produce  by including the following libs and triggering onresize events.

```
nvd3/lib/d3.v2.js
nvd3/src/core.js
nvd3/src/tooltip.js
nvd3/src/utils.js
nvd3/src/models/lineWithFocusChart.js
nvd3/src/models/legend.js
nvd3/src/models/axis.js
nvd3/src/models/line.js
nvd3/src/models/scatter.js
```

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Add opt-in scatter point color override.
Updated several charts so that the showXAxis, showYAxis and rightAlignYAxis options are available for use.
rebuilding nv.d3.js and minified version.
added colorbrewer.js to lib
Merge branch 'master' of https://github.com/novus/nvd3 into development
Merge branch 'development' of https://github.com/novus/nvd3 into development
ran make
expose x-axis group spacing in multibar
Fixed two stacked area chart issues:
1. When in expanded view in stacked area chart, if there is missing data (zero data), 'holes' will be displayed in the chart where data is missing.
2. Tooltips used to be disabled if the stacked area showed values less than zero. This functionality has been disabled.
Added 'rightAlign' property to legend.js (defaults to true). If set to 'false', legends become left aligned.
updated multiChart to allow changing yDomain on yscales
Merge branch 'master' into development

Conflicts:
	nv.d3.js
Merge branch 'development' of https://github.com/novus/nvd3 into development

Conflicts:
	nv.d3.min.js
correcting bug on heigth and width property accessors of stackedAreaChart
Merge branch 'development' of https://github.com/novus/nvd3 into development

Conflicts:
	nv.d3.min.js
Created nv.models.tooltip in tooltip.js.
This new model encapsulates most of the tooltip functionality.
Updated nv.models.tooltip to have a custom HTML content generator. The default is to put tooltip inside a <table> tag.
Updated scatter.js so that when you mouseover a path-point, it will return all series information in the mouse event dispatch.
Updated nv.models.tooltip with more features.
Updated styling of the tooltip.