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/reblogs/index.js

@@ -0,0 +1,61 @@
+import React from 'react';
+import { connect } from 'react-redux';
+import PropTypes from 'prop-types';
+import ImmutablePropTypes from 'react-immutable-proptypes';
+import LoadingIndicator from '../../components/loading_indicator';
+import { fetchReblogs } from '../../actions/interactions';
+import { ScrollContainer } from 'react-router-scroll';
+import AccountContainer from '../../containers/account_container';
+import Column from '../ui/components/column';
+import ColumnBackButton from '../../components/column_back_button';
+import ImmutablePureComponent from 'react-immutable-pure-component';
+
+const mapStateToProps = (state, props) => ({
+  accountIds: state.getIn(['user_lists', 'reblogged_by', Number(props.params.statusId)])
+});
+
+class Reblogs extends ImmutablePureComponent {
+
+  componentWillMount () {
+    this.props.dispatch(fetchReblogs(Number(this.props.params.statusId)));
+  }
+
+  componentWillReceiveProps(nextProps) {
+    if (nextProps.params.statusId !== this.props.params.statusId && nextProps.params.statusId) {
+      this.props.dispatch(fetchReblogs(Number(nextProps.params.statusId)));
+    }
+  }
+
+  render () {
+    const { accountIds } = this.props;
+
+    if (!accountIds) {
+      return (
+        <Column>
+          <LoadingIndicator />
+        </Column>
+      );
+    }
+
+    return (
+      <Column>
+        <ColumnBackButton />
+
+        <ScrollContainer scrollKey='reblogs'>
+          <div className='scrollable reblogs'>
+            {accountIds.map(id => <AccountContainer key={id} id={id} withNote={false} />)}
+          </div>
+        </ScrollContainer>
+      </Column>
+    );
+  }
+
+}
+
+Reblogs.propTypes = {
+  params: PropTypes.object.isRequired,
+  dispatch: PropTypes.func.isRequired,
+  accountIds: ImmutablePropTypes.list
+};
+
+export default connect(mapStateToProps)(Reblogs);