Multiple LGEO parts libraries

[Michael Horvath]

Miscellaneous observations:

1. "lg_medium_violet" is missing from "lg_color.inc". Fix:

Code:

// 112 MEDIUM VIOLET / 112 MEDIUM BLUISH VIOLET
#declare lg_medium_violet = texture {
 pigment { color srgb <201,202,226>/255 }
 finish  { lg_solid_finish }
}