tiny-slider and other improvements

[Quicksaver]

Backport from

• [x] https://github.com/marzeelabs/portoio/pull/29 - move to tiny slider and other improvements
• [x] https://github.com/marzeelabs/portoio/pull/31 - move some components to partials folder
• [x] https://github.com/marzeelabs/portoio/pull/35 - href to xlinkHref
• [x] https://github.com/marzeelabs/portoio/pull/43 - gmap code, src extractor, embed iframe
• [x] https://github.com/marzeelabs/portoio/pull/45 - reservations widget can be useful in a generic way (get code from tree, not from PR)
• [x] https://github.com/marzeelabs/portoio/pull/47 - use cns and organize css, build header and footer links from content (also move footer data to settings instead of having footer content), Quotes slider
• [x] https://github.com/marzeelabs/portoio/pull/54 - locale switcher