Add "+" as config interface

Add "+" as config interface
Fail to build using install_github #12

DESCRIPTION file contain a blank line.
lazyPlot mode for config recharts output online.

Please use the new shiny version(0.9.1) for the use of lazyplot mode.
Use eOption to set size and calcuable.

EchartObject + eOption(size=c(1024,768), calcuable=T )
Update for ChinaR conference

Use lazyPlot(eMapObject)/ lazyPlot(eLine) for ui-based chart
configuration
Update DESCRIPTION