* Theme refactoring
- New hero, header and body font mixins added to theme files;
- Mods to body, griditem, frames, browsebar, etc. to use new font
mixins;
- Moved symbolsfont definition into _constants.scss;
* Tweak - make SubobjectView use header font;
* Add new theme 'maelstrom';
* Add comment
* Remove deprecated .svg and .eot symbol font files
