Lighting #14
Description
Added some lights in the commit 970dc01. This is based on drawLights.py example. Also added a keystroke "L" to toggle showing and not showing lights positions. The idea is that, the user should be able to place the lights where ever he/she deems best. However this seems buggy - or I have not understood what is it doing. The lights are turned on only when the drawLight function is being called? is not drawLight supposed to more like show_where_lights_are?
Also does restorefromfile() restore the light positions? - Doesn't seem to do this.