[Autoflow] Add SCSS files

Merge in SCSS files and platform markup which supports
autoflow tabular views for WTD-611 into the open-source-friendly
master branch.

platform/commonUI/general/res/sass/controls/_buttons.scss

@@ -0,0 +1,52 @@
+$pad: $interiorMargin * 2;
+
+/*********************************** TYPE STYLES */
+.t-btn {
+	cursor: pointer;
+}
+
+
+/*********************************** STYLE STYLES */
+.s-btn {
+	$base: lighten($colorBodyBg, 20%);
+	@include border-radius($controlCr);
+	@include box-sizing(border-box);
+	@include text-shadow(rgba(black, 0.3) 0 1px 1px);
+	line-height: 1.2em;
+	padding: 0 $pad;
+	text-decoration: none;
+	&.s-very-subtle {
+		@include containerSubtle($colorBodyBg, $colorBodyFg, true);
+	}
+}
+
+.s-icon-btn {
+	@extend .s-btn;
+	font-size: 1.2em;
+	.icon {
+		color: $colorKey;
+	}
+
+	&:not(.disabled):hover .icon {
+		color: lighten($colorKey, $ltGamma);
+	}
+
+	&.labeled {
+		padding: 0 $pad/2;
+		.icon {
+			font-size: 1.5em;
+		}
+		.title-label {
+			margin-left: $interiorMargin;
+		}
+	}
+}
+
+
+/*********************************** LAYOUT STYLES */
+span.l-btn,
+span.l-btn span,
+a.l-btn,
+a.l-btn span {
+	display: inline-block;
+}