Replace Library and LMC logos with inline SVGs

[tomkeays]

To avoid hosting them on a CDN, replace the Library and the LMC logos with inline versions of the SVGs.

Additional features to add:

• add hover state (change color on hover)
• include aria-label for accessibility

CodePen mockup: https://codepen.io/tomkeays/pen/RLgMQN

[tomkeays]

Live now in LibGuides and LibCal:

• updated https://libapps.s3.amazonaws.com/sites/20/include/bootstrap-custom.min.css to include hover state on svg.lmc-svg-banner-logo class
• update custom js-css code files in LG and LC to call this revised header
• upload bootstrap-custom.min.css to RackSpace files to cover other sites:
  • http://6423ab35994a822f653e-1cba4c36ec78f50a350878d40a7c96c2.r6.cf1.rackcdn.com/bootstrap/css/bootstrap-custom.min.css
  • https://0be6e7b30f70d54c41e2-1cba4c36ec78f50a350878d40a7c96c2.ssl.cf1.rackcdn.com/bootstrap/css/bootstrap-custom.min.css

Ultimately, probably need to decide if hosting bootstrap-custom.min.css at RackSpace, even for LG and LC.

[tomkeays]

Have to remember that bootstrap-custom.min.css for Wordpress lives onsite.

[tomkeays]

Replaced all the SVGs with inline versions, including the following:

• banner: NRF Library logo
• banner: LMC logo
• footer: LMC Dolphin brand image
• askus: 6 action icons (chat, text, email, phone, in-person, faq)
  • Exception: the AskUs sidebar widget calls these icons from Rackspace CDN