Corrected typo in "skins-wizard-forground-color"
Changed text slightly to make it clearer that it is a percentage of the
browser's default font size.
Added a note to say this only applies to site skins and inviting the
user to use the Work Skins button for new work skins.
Amended text at the top of the wizard and added a link to create a new
works skin.
Reworded help text following front-end lead's suggestions
Changed link in new wording to point to the work skin creation page.
Merge remote-tracking branch 'origin/Issue_2699-Skins_help' into Issue_2699-Skins_help

Conflicts:
	app/views/skins/new_wizard.html.erb
Merge branch 'master' into Issue_2699-Skins_help
Merge pull request #1598 from ariana-paris/Issue_2699-Skins_help

Issue 2699 skins help