Fixed rotateLabels option for multiBarCharts

Replaced 'text-transform' with correct attribute 'text-anchor' to set
rotation center of labels.
Adjust axis labels on update rather than enter.

This allows an axis to change orientation and have the tick label respond accordingly.
Understandable error messages from uglifyjs
Issue #73 Error: Invalid value for <rect> attribute y="NaN", height="NaN"
Use the formatter that belongs to yAxis of the series to format the y value of a tooltip, instead of basing it on the series chart type.
Multi bar chart legend width computed with 'showControls' respect
Merge pull request #2 from adeven/update

Update upstream
Allow forceY on lines1 and lines2
Fixed rotateLabels option for multiBarCharts

Replaced 'text-transform' with correct attribute 'text-anchor' to set
rotation center of labels.
added lineTimeSeriesChart with example
added initial support for zoom and pan to dynamic line time series
adding d3.event to event listeners

Adding d3.event to event listeners to maintain consistency between models.  In the historical bar chart they are included, but not the line which uses the scatters events.
Added donutRatio public variable

Added donutRatio public variable to pie model.  Allows customization of the inner radius of the donut pie chart.
rebind donutRatio for pieChart
Adjust axis labels on update rather than enter.

This allows an axis to change orientation and have the tick label respond accordingly.
exposed public variable brushExtent

the variable brushExtent is documented as a public variable but is not currently exposed.  this exposes it allowing the user to control which portion of the crossfilter is selected at initiation.
updating spacing
Fix bug of updateFisheye when you filtered out some data
* Fix on Lee Gillentine's commit 2ac200ead07d4be299466b2513c9e9d1b760c66d
Cannot read property 'values' of undefined nv.d3.js:8498
Cannot read property 'values' of undefined nv.d3.js:8511
* Fix on twolf's commit 8e0160ad5f15f3c9d28a38c9b2c7ed1fc48e9f8

Problem parsing d="MZ" error