Simple loading css/html animation
Replaces spinner with loader

Removes loader.html from public
Replaces img logo on splash with modified loader
Adds fade-in to splash
Removes commented out img tag
Moves logo to splash background
Freezing the logo animation at the start now results in the static logo

Gemfile.lock makes issues
Flexbox to size splash page, logo no longer behind text
Flexbox all the things!
Merge pull request #36 from spectra-music/features/loading

Features/loading