new buttons

app/assets/stylesheets/framework/buttons.scss

 @mixin btn-default {
-  @include border-radius(2px);
+  @include border-radius(3px);
   border-width: 1px;
   border-style: solid;
-  text-transform: uppercase;
-  font-size: 13px;
-  font-weight: 600;
+  font-size: 15px;
+  font-weight: 500;
   line-height: 18px;
   padding: 11px $gl-padding;
   letter-spacing: .4px;
@@ -18,7 +17,7 @@
 
 @mixin btn-middle {
   @include btn-default;
-  @include border-radius(2px);
+  @include border-radius(3px);
   padding: 11px 24px;
 }
 
@@ -60,7 +59,7 @@
 }
 
 @mixin btn-gray {
-  @include btn-color($gray-light, $border-gray-light, $gray-normal, $border-gray-normal, $gray-dark, $border-gray-dark, #313236);
+  @include btn-color($gray-light, $border-gray-light, $gray-normal, $border-gray-light, $gray-dark, $border-gray-dark, #313236);
 }
 
 @mixin btn-white {
@@ -74,6 +73,10 @@
   &.btn-sm {
     padding: 5px 10px;
   }
+  
+  &.btn-nr {
+    padding: 7px 10px;
+  }
 
   &.btn-xs {
     padding: 1px 5px;