Delete unused files, restructure assets and use scss

.gitignore

app/__init__.py

app/decorators.py

app/email.py

app/models.py

app/static/css/colors.scss

app/static/css/material_icons.css

app/static/css/materialize.min.css

app/static/css/materialize/fixes.css

app/static/css/materialize/sidenav_fixed.css

app/static/css/materialize/sticky_footer.css

app/static/css/nopaque.css

app/static/css/nopaque_icons.css

app/static/css/style.css

app/static/fonts/material_icons/MaterialIcons-Regular.ttf

...ic/fonts/material_icons/MaterialIconsOutlined-Regular.otf

...tatic/fonts/material_icons/MaterialIconsRound-Regular.otf

...tatic/fonts/material_icons/MaterialIconsSharp-Regular.otf

...tic/fonts/material_icons/MaterialIconsTwoTone-Regular.otf

app/static/js/App.js