Handled README.md conflict
Merge branch 'master' into Jeff
Merge branch 'master' into Jeff
Added Gray2RGB: grayscale to RGB image converter
Extended Gray2RGB to handle image stacks
Fixed bug in indexing of Mlists in RenderMList: Untested
Added RenderStack to render molecules indexed by a specific variable
Added memory efficient option to Gray2RGB to handle large images and stacks
Updated RenderStack
Merged changes in rendering programs