Version=1.1 caused Travis CI builds to fail.
Version 1.1 was necessary only to standardize the Keywords key,
but this key is a potential pitfall and unnecessary.
- New script generatePngIcons to generate PNG icons from SVG ones.
- Deleted all SVG icons.
- Created new SVG icon template.
- Created atom.svg using new template.
- Deleted tools/source_icons
- Moved non-icon files out of rtdata/icons