Improve emojis - use SVGs where possible

app/assets/javascripts/components/emoji.jsx

@@ -1,9 +1,35 @@
 import emojione from 'emojione';
 
-emojione.imageType    = 'png';
-emojione.sprites      = false;
-emojione.imagePathPNG = '/emoji/';
+const toImage = str => shortnameToImage(unicodeToImage(str));
+
+const unicodeToImage = str => {
+  const mappedUnicode = emojione.mapUnicodeToShort();
+
+  return str.replace(emojione.regUnicode, unicodeChar => {
+    if (typeof unicodeChar === 'undefined' || unicodeChar === '' || !(unicodeChar in emojione.jsEscapeMap)) {
+      return unicodeChar;
+    }
+
+    const unicode  = emojione.jsEscapeMap[unicodeChar];
+    const short    = mappedUnicode[unicode];
+    const filename = emojione.emojioneList[short].fname;
+    const alt      = emojione.convert(unicode.toUpperCase());
+
+    return `<img draggable="false" class="emojione" alt="${alt}" src="/emoji/${filename}.svg" />`;
+  });
+};
+
+const shortnameToImage = str => str.replace(emojione.regShortNames, shortname => {
+  if (typeof shortname === 'undefined' || shortname === '' || !(shortname in emojione.emojioneList)) {
+    return shortname;
+  }
+
+  const unicode = emojione.emojioneList[shortname].unicode[emojione.emojioneList[shortname].unicode.length - 1];
+  const alt     = emojione.convert(unicode.toUpperCase());
+
+  return `<img draggable="false" class="emojione" alt="${alt}" src="/emoji/${unicode}.svg" />`;
+});
 
 export default function emojify(text) {
-  return emojione.toImage(text);
+  return toImage(text);
 };

app/assets/javascripts/components/features/compose/components/emoji_picker_dropdown.jsx

@@ -43,7 +43,7 @@ const EmojiPickerDropdown = React.createClass({
     return (
       <Dropdown ref={this.setRef} style={style}>
         <DropdownTrigger className='emoji-button' title={intl.formatMessage(messages.emoji)} style={{ fontSize: `24px`, width: `24px`, lineHeight: `24px`, display: 'block', marginLeft: '2px' }}>
-          <img className="emojione" alt="🙂" src="/emoji/1f602.png" />
+          <img draggable="false" className="emojione" alt="🙂" src="/emoji/1f602.svg" />
         </DropdownTrigger>
 
         <DropdownContent className='dropdown__left'>

app/assets/javascripts/components/features/getting_started/index.jsx

@@ -41,7 +41,7 @@ const GettingStarted = ({ intl, me }) => {
         <ColumnLink icon='sign-out' text={intl.formatMessage(messages.sign_out)} href='/auth/sign_out' method='delete' />
       </div>
 
-      <div className='scrollable optionally-scrollable'>
+      <div className='scrollable optionally-scrollable' style={{ display: 'flex', flexDirection: 'column' }}>