[New Feature][issue-17] Adds rs-clear-facets-link to facet section titles
[New Feature][issue-17] Adds rs-facets-header and rs-clear-facets-link styles
[New Feature][issue-17] Adds markup for headers and clear links

Headers include:
	- rs-facets-header
	- rs-facets-section-header

Clear Links:
	- rs-clear-facets-link
[New Feature][issue-17] Updates facets.js to use new headers markup and to set click on clear facets links
[New Feature][issue-17] Adds rs-facets-headers to demo
[New Feature][issue-17] Moves rs-page-title into panel content in UX Pattern doc for List View
[New Feature][issue-17] Adds documentation verbiage for the rs-facets-header text
[New Feature][issue-17] Pastes facets markup from demo into facets.html in the includes directory

this file is used in the UX Pattern and the UI Component docs for faceting