javascriptRRD v0.4 released

I am happy to announce that javascriptRRD v0.4 has been released. This version improves the integration with Flot by both improving the single RRD plotting class (rrdFlot) as well as adding a multi-RRD plotting class (rrdFlotMatrix).

The interfaces to both rrdFlot and rrdFlotMatrix are expected to be final, and any change in the future will be backward compatible.