#3, + creating combined & pro styles

Improvements:

1. Created style/stylx with symbol sets combined (in
solutions-symbology-combined folder)
2. Also (a) added missing category/tags to styles, (b) changed source
image to vector/emf (so it could be scaled) and (c) set the default size
to an enlarged value of 32
3. Included/added emf/vector source images
4. Readme improvements from #3 & moved unused image jpgs to doc folder