New Graphing Features using Amcharts

[jegelstaff]

It appears the only things relying on the current file are certain parts of ESAT: performance_measurement.php, timepoint-chart.php, skill-chart.php

There is also a modules/formulize/class/graph.php file that appears to be unreferenced anywhere?? A stub from something else?

Our done criteria for this are:

• ability to display bar graphs
• ability to display line graphs
• ability to display radar graphs
• connect to a screen type, that lets you specify a data set based on a saved view, like a LOE screen, and to set all relevant options depending on the type of graph
• ability to specify how the data set is to be read: each record is a data point, or each field in a record is a data point, or a calculation operation on a record is a data point (which means the saved view could/should be a calculation saved view??)
• Make legend appear beside or below chart depending on mobile or not
• Make legend appearance configurable on / off / position (but default based on mobile or not)
• Doc blocks for functions