Merge theme into main repository

theme/.gitignore

theme/sass/components/_buttons.scss

theme/sass/components/_cards.scss

theme/sass/components/_carousel.scss

theme/sass/components/_chips.scss

theme/sass/components/_collapsible.scss

theme/sass/components/_color.scss

theme/sass/components/_dropdown.scss

theme/sass/components/_form.scss

theme/sass/components/_global.scss

theme/sass/components/_grid.scss

theme/sass/components/_icons-material-design.scss

theme/sass/components/_materialbox.scss

theme/sass/components/_mixins.scss

theme/sass/components/_modal.scss

theme/sass/components/_navbar.scss

theme/sass/components/_normalize.scss

theme/sass/components/_prefixer.scss

theme/sass/components/_preloader.scss

theme/sass/components/_roboto.scss