Adding zoom type option
Merge pull request #26 from ratibus/master

Zoom type option available
Added 'data-graph-datalabels-formatter' option
Merge pull request #29 from maxailloud/master

Added "data-graph-datalabels-formatter" option
fix issue #32 default value must be undefined

When we have an inverted column graph we need to use "undefined" has default value instead of "center" for dataLabels align.
Merge pull request #33 from BenoitLeveque/patch-1

fix issue #32 default value must be undefined
Fix bug when there are no data in a cell with an axis in datetime type
Adding hour parsing in date parsing
Some more options to use spiderweb graph and polar chart (need to include highcharts-more.js)

 * data-graph-polar
"true" to render a polar graph.
Default: undefined

 * data-graph-yaxis-{X}-grid-line-interpolation
Define the graph type.
Default: null
ex: "polygon" to get a spiderweb graph

 * data-graph-xaxis-show-last-label
If you have a number on the last label, put it to false.
Default: true

 * tickmarkPlacement
For categorized axes only. If "on" the tick mark is placed in the center of the category, if "between" the tick mark is placed between categories.
default: "on"

 * data-graph-xaxis-gridLine-width
The width of the grid lines extending the ticks across the plot area.
Default: 0
Use default values of highcharts for polar and tickmarkPlacement options
Merge pull request #36 from lotholf/master

Adding hour parsing and fixing no data cell bug in datetime type for X axis
Merge pull request #37 from MatCottet/spiderweb

Some more options to use spiderweb graph and polar chart
fix duplicated tooltip with pie chart
Merge pull request #38 from BenoitLeveque/patch-2

fix duplicated tooltip with pie chart