Added client-side conversion of HTML color names to RGB values. Needed for avoiding CSS style errors when user inputs unknown name, and also because web browsers and Pike don't interpret all names the same (e.g. "green" gives different color values). Implemented CSS-based crosshair to indicate current color selection which also means fewer requests for /internal-roxen-colorbar from the server. Rev: server/modules/tags/javascript_support/scripts/ColorSelector.js:1.3