Replace sprockets/browserify with Webpack (#2617)

* Replace browserify with webpack

* Add react-intl-translations-manager

* Do not minify in development, add offline-plugin for ServiceWorker background cache updates

* Adjust tests and dependencies

* Fix production deployments

* Fix tests

* More optimizations

* Improve travis cache for npm stuff

* Re-run travis

* Add back support for custom.scss as before

* Remove offline-plugin and babili

* Fix issue with Immutable.List().unshift(...values) not working as expected

* Make travis load schema instead of running all migrations in sequence

* Fix missing React import in WarningContainer. Optimize rendering performance by using ImmutablePureComponent instead of
React.PureComponent. ImmutablePureComponent uses Immutable.is() to compare props. Replace dynamic callback bindings in
<UI />

* Add react definitions to places that use JSX

* Add Procfile.dev for running rails, webpack and streaming API at the same time

app/javascript/mastodon/features/compose/components/search_results.js

@@ -0,0 +1,67 @@
+import React from 'react';
+import ImmutablePropTypes from 'react-immutable-proptypes';
+import { defineMessages, injectIntl, FormattedMessage } from 'react-intl';
+import AccountContainer from '../../../containers/account_container';
+import StatusContainer from '../../../containers/status_container';
+import { Link } from 'react-router';
+import ImmutablePureComponent from 'react-immutable-pure-component';
+
+class SearchResults extends ImmutablePureComponent {
+
+  render () {
+    const { results } = this.props;
+
+    let accounts, statuses, hashtags;
+    let count = 0;
+
+    if (results.get('accounts') && results.get('accounts').size > 0) {
+      count   += results.get('accounts').size;
+      accounts = (
+        <div className='search-results__section'>
+          {results.get('accounts').map(accountId => <AccountContainer key={accountId} id={accountId} />)}
+        </div>
+      );
+    }
+
+    if (results.get('statuses') && results.get('statuses').size > 0) {
+      count   += results.get('statuses').size;
+      statuses = (
+        <div className='search-results__section'>
+          {results.get('statuses').map(statusId => <StatusContainer key={statusId} id={statusId} />)}
+        </div>
+      );
+    }
+
+    if (results.get('hashtags') && results.get('hashtags').size > 0) {
+      count += results.get('hashtags').size;
+      hashtags = (
+        <div className='search-results__section'>
+          {results.get('hashtags').map(hashtag =>
+            <Link className='search-results__hashtag' to={`/timelines/tag/${hashtag}`}>
+              #{hashtag}
+            </Link>
+          )}
+        </div>
+      );
+    }
+
+    return (
+      <div className='search-results'>
+        <div className='search-results__header'>
+          <FormattedMessage id='search_results.total' defaultMessage='{count, number} {count, plural, one {result} other {results}}' values={{ count }} />
+        </div>
+
+        {accounts}
+        {statuses}
+        {hashtags}
+      </div>
+    );
+  }
+
+}
+
+SearchResults.propTypes = {
+  results: ImmutablePropTypes.map.isRequired
+};
+
+export default SearchResults;