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/selectors/index.js

@@ -0,0 +1,73 @@
+import { createSelector } from 'reselect';
+import Immutable from 'immutable';
+
+const getStatuses = state => state.get('statuses');
+const getAccounts = state => state.get('accounts');
+
+const getAccountBase         = (state, id) => state.getIn(['accounts', id], null);
+const getAccountCounters     = (state, id) => state.getIn(['accounts_counters', id], null);
+const getAccountRelationship = (state, id) => state.getIn(['relationships', id], null);
+
+export const makeGetAccount = () => {
+  return createSelector([getAccountBase, getAccountCounters, getAccountRelationship], (base, counters, relationship) => {
+    if (base === null) {
+      return null;
+    }
+
+    return base.merge(counters).set('relationship', relationship);
+  });
+};
+
+export const makeGetStatus = () => {
+  return createSelector(
+    [
+      (state, id) => state.getIn(['statuses', id]),
+      (state, id) => state.getIn(['statuses', state.getIn(['statuses', id, 'reblog'])]),
+      (state, id) => state.getIn(['accounts', state.getIn(['statuses', id, 'account'])]),
+      (state, id) => state.getIn(['accounts', state.getIn(['statuses', state.getIn(['statuses', id, 'reblog']), 'account'])]),
+    ],
+
+    (statusBase, statusReblog, accountBase, accountReblog) => {
+      if (!statusBase) {
+        return null;
+      }
+
+      if (statusReblog) {
+        statusReblog = statusReblog.set('account', accountReblog);
+      } else {
+        statusReblog = null;
+      }
+
+      return statusBase.withMutations(map => {
+        map.set('reblog', statusReblog);
+        map.set('account', accountBase);
+      });
+    }
+  );
+};
+
+const getAlertsBase = state => state.get('alerts');
+
+export const getAlerts = createSelector([getAlertsBase], (base) => {
+  let arr = [];
+
+  base.forEach(item => {
+    arr.push({
+      message: item.get('message'),
+      title: item.get('title'),
+      key: item.get('key'),
+      dismissAfter: 5000
+    });
+  });
+
+  return arr;
+});
+
+export const makeGetNotification = () => {
+  return createSelector([
+    (_, base)             => base,
+    (state, _, accountId) => state.getIn(['accounts', accountId])
+  ], (base, account) => {
+    return base.set('account', account);
+  });
+};