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/reducers/user_lists.js

@@ -0,0 +1,80 @@
+import {
+  FOLLOWERS_FETCH_SUCCESS,
+  FOLLOWERS_EXPAND_SUCCESS,
+  FOLLOWING_FETCH_SUCCESS,
+  FOLLOWING_EXPAND_SUCCESS,
+  FOLLOW_REQUESTS_FETCH_SUCCESS,
+  FOLLOW_REQUESTS_EXPAND_SUCCESS,
+  FOLLOW_REQUEST_AUTHORIZE_SUCCESS,
+  FOLLOW_REQUEST_REJECT_SUCCESS
+} from '../actions/accounts';
+import {
+  REBLOGS_FETCH_SUCCESS,
+  FAVOURITES_FETCH_SUCCESS
+} from '../actions/interactions';
+import {
+  BLOCKS_FETCH_SUCCESS,
+  BLOCKS_EXPAND_SUCCESS
+} from '../actions/blocks';
+import {
+  MUTES_FETCH_SUCCESS,
+  MUTES_EXPAND_SUCCESS
+} from '../actions/mutes';
+import Immutable from 'immutable';
+
+const initialState = Immutable.Map({
+  followers: Immutable.Map(),
+  following: Immutable.Map(),
+  reblogged_by: Immutable.Map(),
+  favourited_by: Immutable.Map(),
+  follow_requests: Immutable.Map(),
+  blocks: Immutable.Map(),
+  mutes: Immutable.Map()
+});
+
+const normalizeList = (state, type, id, accounts, next) => {
+  return state.setIn([type, id], Immutable.Map({
+    next,
+    items: Immutable.List(accounts.map(item => item.id))
+  }));
+};
+
+const appendToList = (state, type, id, accounts, next) => {
+  return state.updateIn([type, id], map => {
+    return map.set('next', next).update('items', list => list.concat(accounts.map(item => item.id)));
+  });
+};
+
+export default function userLists(state = initialState, action) {
+  switch(action.type) {
+  case FOLLOWERS_FETCH_SUCCESS:
+    return normalizeList(state, 'followers', action.id, action.accounts, action.next);
+  case FOLLOWERS_EXPAND_SUCCESS:
+    return appendToList(state, 'followers', action.id, action.accounts, action.next);
+  case FOLLOWING_FETCH_SUCCESS:
+    return normalizeList(state, 'following', action.id, action.accounts, action.next);
+  case FOLLOWING_EXPAND_SUCCESS:
+    return appendToList(state, 'following', action.id, action.accounts, action.next);
+  case REBLOGS_FETCH_SUCCESS:
+    return state.setIn(['reblogged_by', action.id], Immutable.List(action.accounts.map(item => item.id)));
+  case FAVOURITES_FETCH_SUCCESS:
+    return state.setIn(['favourited_by', action.id], Immutable.List(action.accounts.map(item => item.id)));
+  case FOLLOW_REQUESTS_FETCH_SUCCESS:
+    return state.setIn(['follow_requests', 'items'], Immutable.List(action.accounts.map(item => item.id))).setIn(['follow_requests', 'next'], action.next);
+  case FOLLOW_REQUESTS_EXPAND_SUCCESS:
+    return state.updateIn(['follow_requests', 'items'], list => list.concat(action.accounts.map(item => item.id))).setIn(['follow_requests', 'next'], action.next);
+  case FOLLOW_REQUEST_AUTHORIZE_SUCCESS:
+  case FOLLOW_REQUEST_REJECT_SUCCESS:
+    return state.updateIn(['follow_requests', 'items'], list => list.filterNot(item => item === action.id));
+  case BLOCKS_FETCH_SUCCESS:
+    return state.setIn(['blocks', 'items'], Immutable.List(action.accounts.map(item => item.id))).setIn(['blocks', 'next'], action.next);
+  case BLOCKS_EXPAND_SUCCESS:
+    return state.updateIn(['blocks', 'items'], list => list.concat(action.accounts.map(item => item.id))).setIn(['blocks', 'next'], action.next);
+  case MUTES_FETCH_SUCCESS:
+    return state.setIn(['mutes', 'items'], Immutable.List(action.accounts.map(item => item.id))).setIn(['mutes', 'next'], action.next);
+  case MUTES_EXPAND_SUCCESS:
+    return state.updateIn(['mutes', 'items'], list => list.concat(action.accounts.map(item => item.id))).setIn(['mutes', 'next'], action.next);
+  default:
+    return state;
+  }
+};