modularize themes and convert them to sass (closes #191)

css/theme/template/settings.scss

@@ -0,0 +1,33 @@
+// Base settings for all themes that can optionally be 
+// overridden by the super-theme
+
+// Background of the presentation
+$backgroundColor: #2b2b2b;
+
+// Primary/body text
+$mainFont: 'Lato', Times, 'Times New Roman', serif;
+$mainFontSize: 36px;
+$mainColor: #eee;
+
+// Headings
+$headingFont: 'League Gothic', Impact, sans-serif;
+$headingColor: #eee;
+$headingLineHeight: 0.9em;
+$headingLetterSpacing: 0.02em;
+$headingTextTransform: uppercase;
+$headingTextShadow: 0px 0px 6px rgba(0,0,0,0.2);
+$heading1TextShadow: $headingTextShadow;
+
+// Links and actions
+$linkColor: #13DAEC;
+$linkColorHover: lighten( $linkColor, 20% );
+
+// Text selection
+$selectionBackgroundColor: #FF5E99;
+$selectionColor: #fff;
+
+// Generates the presentation background, can be overridden
+// to return a background image or gradient
+@mixin bodyBackground() {
+	background: $backgroundColor;
+}