column.val() returns undefined if called with no args
refactored getMaxChartHeight to dw.utils
refactored dw.visualization, setChart instead of load
using numRows() of dataset directly
refactored dw.chart.js into new js core
cleaned up chart template
build
added dw.backend.syncChart (was a part of EditableChart)
mangle compressed javascript
catching undefined values
added column.values()