First pass simple material theme

src/definitions/modules/dropdown.less

@@ -398,6 +398,7 @@ select.ui.dropdown {
   min-width: @menuMinWidth;
   outline: none;
 
+  border-radius: @selectionMenuBorderRadius;
   box-shadow: @selectionMenuBoxShadow;
   transition: @selectionMenuTransition;
 }

src/themes/default/modules/dropdown.variables

@@ -28,7 +28,7 @@
 @menuMargin: 0em;
 @menuPadding: 0em 0em;
 @menuTop: 100%;
-@menuWrap: nowrap;
+@menuWrap: normal;
 @menuTextAlign: left;
 
 @menuBorderWidth: 1px;
@@ -51,8 +51,8 @@
 @itemHeight: auto;
 @itemDivider: none;
 @itemColor: @textColor;
-@itemVerticalPadding: @relativeMini;
-@itemHorizontalPadding: @relativeLarge;
+@itemVerticalPadding: @mini;
+@itemHorizontalPadding: @large;
 @itemPadding: @itemVerticalPadding @itemHorizontalPadding;
 @itemFontWeight: normal;
 @itemLineHeight: 1em;
@@ -119,8 +119,8 @@
 --------------------*/
 /* Selection */
 @selectionMinWidth: 200px;
-@borderEmWidth:  0.0785em; /* 2px / em size */
-@selectionMinHeight: @defaultInputLineHeight + (@selectionVerticalPadding * 2) - @borderEmWidth;
+@selectionBorderEmWidth:  0.0785em; /* 2px / em size */
+@selectionMinHeight: @defaultInputLineHeight + (@selectionVerticalPadding * 2) - @selectionBorderEmWidth;
 @selectionBackground: @white;
 @selectionDisplay: inline-block;
 @selectionVerticalPadding: 0.78571em;
@@ -154,6 +154,7 @@
 @selectionIconPadding: @selectionIconHitbox;
 @selectionIconTransition: opacity @transitionDuration @transitionEasing;
 
+@selectionMenuBorderRadius: 0em 0em @borderRadius @borderRadius;
 @selectionMenuBoxShadow: @raisedShadow;
 @selectionMenuItemBoxShadow: none;
 

src/themes/material/modules/dropdown.overrides

@@ -1,4 +1,4 @@
-@import url(http://fonts.googleapis.com/css?family=Roboto);
+@import url(http://fonts.googleapis.com/css?family=Roboto:400,700);
 
 .ui.dropdown {
   font-family: 'Roboto';

src/themes/material/modules/dropdown.variables

@@ -2,4 +2,19 @@
              Menu
 *******************************/
 
+@menuBorderRadius: @borderRadius;
+@menuBorderColor: #DADADA;
+@menuBoxShadow: 0px 2px 4px rgba(0, 0, 0, 0.2);
 
+@menuPadding: 0.5714em 0em;
+@itemVerticalPadding: 1em;
+@itemHorizontalPadding: 1.5em;
+
+@menuHeaderFontSize: @small;
+@menuHeaderFontWeight: bold;
+@menuHeaderTextTransform: none;
+
+@selectionBorderEmWidth: 0em;
+@selectionItemDivider: none;
+
+@labelBoxShadow: none;