Refactored JS for theme support.  Started working on CSS for "thin" theme.  Named base theme "default".
Scaled down images for "thin" theme.  Updated folder structure for themes.
Updated file structure in preparation of v1.1.0.  Added individual folders / css files for themes.
Updated file structure to be more plugin oriented.
Added files ignored by "git add ./".
Updated README.md with note about including themes.  Need to add better theme documentation at later time.