Initial add of alerts.

lib/sass/alerts.scss

@@ -0,0 +1,7 @@
+//
+// Alerts
+// --------------------------------------------------
+
+.alert {
+
+}

lib/sass/ratchet.scss

@@ -18,6 +18,7 @@
 @import "badges.scss";
 @import "segmented-controllers.scss";
 @import "popovers.scss";
+@import "alerts.scss";
 
 // Javascript components
 @import "modals.scss";