initial version of mult-event timeseries

[darkone23]

First version of multi-event timeseries.

Pulls colors off a color array and renders them along with a legend.

Improves the existing timeseries functionality by turning n unique event/host pairs into n series rather than treating all matched events as a single series.

Future goals:

• organize legend by host or service (currently it's first come first render)
• add customizable color pallettes
• make throttling optional

Currently supports:

• Arbitrary number of timeseries from event/host pairs (with anything over around 20 uniques resulting in color collissions)
• customizable line width
• customizable opacity.

[aphyr]

YUSSSS