About to start work on buttons

public/input/button/Button.jsx

@@ -73,6 +73,8 @@ export default class Button extends React.Component {
       style = "secondary";
     } else if(this.props.danger) {
       style = "danger";
+    } else if(this.props.warning) {
+      style = "warning";
     } else if(this.props.style) {
       style = this.props.style;
     }

public/input/button/ButtonGroup.jsx

@@ -0,0 +1,32 @@
+// Copyright (c) 2018 Dominic Masters
+//
+// MIT License
+//
+// Permission is hereby granted, free of charge, to any person obtaining
+// a copy of this software and associated documentation files (the
+// "Software"), to deal in the Software without restriction, including
+// without limitation the rights to use, copy, modify, merge, publish,
+// distribute, sublicense, and/or sell copies of the Software, and to
+// permit persons to whom the Software is furnished to do so, subject to
+// the following conditions:
+//
+// The above copyright notice and this permission notice shall be
+// included in all copies or substantial portions of the Software.
+//
+// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+// EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+// MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+// NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
+// LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
+// OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+// WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+
+import React from 'react';
+
+export default function(props) {
+  return (
+    <div {...props} class={"o-btn-group" + (props.className ? " "+props.className : "")}>
+      {props.children}
+    </div>
+  );
+}