Fix to allow Windows systems to load default css

Wrong slash in url caased problems.   Without the fix a url like this

http://pyebrook.local/wp-content/plugins/WP-e-Commercewpsc-componentstheme-engine-v1/templates/wpsc-default.css

can appear in the document instead of

http://pyebrook.local/wp-content/plugins/WP-e-Commercewpsc-componentstheme-engine-v1/templates/wpsc-default.css

http://pyebrook.local/wp-content/plugins/WP-e-Commerce/wpsc-components/theme-engine-v1/templates/wpsc-default.css
should not specify div width

specified div width will cause container to be bigger than parent
Merge branch 'theme-engine-default-style-fix' of github.com:JeffSparkleGear/WP-e-Commerce into theme-engine-default-style-fix