changed the crosshairs property of tooltip from a simple boolean to an object to support some options available in highcharts (this is support only for the X-axis crosshair)
remove log message
fixed itemStyle in Legend
fixed performance issues in DateTimePoint and added turboThreshold option to plotOptions
Merge https://github.com/SakulK/InvientCharts

Conflicts:
	invient-charts-demo/pom.xml
	invient-charts/pom.xml
	pom.xml