Added Jeff Buck to copyright in license.
Added Jeff Buck to copyright in license.

LiDechao/core-plot,zenXian/core-plot,divyavamsee/core-plot,eoinnorris/core-plot,divyavamsee/core-plot,divyavamsee/core-plot,divyavamsee/core-plot,kamalvenkat/core-plot,LiDechao/core-plot,eoinnorris/core-plot,zenXian/core-plot,tectronics/core-plot,kamalvenkat/core-plot,kamalvenkat/core-plot,LiDechao/core-plot,eoinnorris/core-plot,sureshdustrise/core-plot,zenXian/core-plot,eoinnorris/core-plot,kamalvenkat/core-plot,zenXian/core-plot,tectronics/core-plot,tectronics/core-plot,sureshdustrise/core-plot,tectronics/core-plot,sureshdustrise/core-plot,LiDechao/core-plot,sureshdustrise/core-plot