Sub page slider fixes, recent tweet via social links, etc...

NSi main WP theme edits/additions: Minor fixes to sub hero wooslider
(where slide two was showing first), code cleanup, edits to custom
fields, twitter feed integration for both main and vendor pages
(visibility and twitter handle reliant on "@USERNAME" added in "Social
Links" inside the Customizer panel), Misc Wooslider css overrides,
initiate vendor sub page footer and widgets (different from home page),
removed social link "print" to main navigation bar,