is-rounded (#1323)

* is-rounded

* padding

sass/utilities/initial-variables.sass

@@ -62,4 +62,5 @@ $easing: ease-out !default
 $radius-small: 2px !default
 $radius: 3px !default
 $radius-large: 5px !default
+$radius-rounded: 290486px !default
 $speed: 86ms !default

sass/utilities/mixins.sass

@@ -38,7 +38,7 @@
   -webkit-appearance: none
   background-color: rgba($black, 0.2)
   border: none
-  border-radius: 290486px
+  border-radius: $radius-rounded
   cursor: pointer
   display: inline-block
   flex-grow: 0
@@ -144,7 +144,7 @@
 =loader
   animation: spinAround 500ms infinite linear
   border: 2px solid $border
-  border-radius: 290486px
+  border-radius: $radius-rounded
   border-right-color: transparent
   border-top-color: transparent
   content: ""