Tooltip.pointFormat and Tooltip.formatter

[pawelfus]

Current solution for tooltip.enabledIndicators needs to be refactored. Issues:

• tooltip.pointFormat is not respected at all
• in tooltip.formatter we have no easy access to indicator object, under point.indicators.indicator_name[index] we have only x+y values, a reference to the indicator would be great, to get color, names etc.

[pawelfus]

It is still broken: http://jsfiddle.net/v783m0Lo/