Fix CSS issues for cross-browser support (#15)
Fix CSS issues for cross-browser support (#15)

* Fix issues with CSS on browsers that use shim

See:
https://www.polymer-project.org/2.0/docs/devguide/style-shadow-dom#style-slotted-content-distributed-children

"Note: To work within the Shady CSS scoping shim limitations,
and to ensure consistent cross-browser behavior, add a selector to
the left of the ::slotted(.classname) notation (for example,
p ::slotted(.classname)."

* Wrap styles in <custom-styles> as Polymer 2.0 suggests

* Fix vertical carousel in shimmed browsers

* Remove custom-style tag completely

* Fix typo

FabricElements/skeleton-carousel,FabricElements/skeleton-carousel