Fix for #68
Slider fixes.
Merge pull request #75 from gjb2048/master_#68

Fix for #68
Add text colour.

Conflicts:
	style/essential.css
Fix icon colour in line with SVG's.

Conflicts:
	style/essential.css
Don't compress as Moodle does in the cache and makes it harder to debug otherwise.

Conflicts:
	style/essential.css
Recompile CSS after rebase.