Load toolbar and palette images from image sprites, with pre-built sprite png and css.

Resize stencilset icons so they are all 16x16. This applies mainly to those in 'list' folders.

Development of sprite implementation for palette

Load toolbar and palette images from image sprites, with pre-built sprite and css. Includes resizing some bpmn2.0jbpm stencilset icons so they are all 16x16.

Load toolbar and palette images from image sprites, with pre-built sprite and css.
Load morph-menu and simulation images from image sprites.
BZ 1033693 - Include svg images inline in bpmn2.0jbpm.orig stencilset and add utility Java app to add the images to stencilset with svg file references.
Document sprite-generation and add script for generating sprites
Add .gitignore and remove .iml file