Font-weight: 600 for buttons

src/stylesheets/Lungo.widgets.button.styl

@@ -20,7 +20,7 @@
   color: #fff !important
   font-family: inherit
   font-size: 1.05em
-  font-weight: 400
+  font-weight: 600
   text-align: center
   text-decoration: none
   outline: none

src/stylesheets/css/Lungo.widgets.button.css

@@ -15,7 +15,7 @@ button {
   color: #fff !important;
   font-family: inherit;
   font-size: 1.05em;
-  font-weight: 400;
+  font-weight: 600;
   text-align: center;
   text-decoration: none;
   outline: none;