Set up flow config; add third party libdefs

types/create-react-class.js

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+// flow-typed signature: 121e589c9be7dac408c14a02e88287fa
+// flow-typed version: a1a20d4928/create-react-class_v15.x.x/flow_>=v0.41.x
+
+declare module 'create-react-class' {
+  declare var exports: React$CreateClass;
+}

types/fbjs.js

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+/**
+ * Copyright (c) 2013-present, Facebook, Inc.
+ * All rights reserved.
+ *
+ * This source code is licensed under the BSD-style license found in the
+ * LICENSE file in the root directory of this source tree. An additional grant
+ * of patent rights can be found in the PATENTS file in the same directory.
+ */
+
+declare module 'fbjs/lib/invariant' {
+  declare function exports<T>(
+    condition: any,
+    message: string,
+    ...args: Array<any>
+  ): void;
+}
+
+declare module 'fbjs/lib/nullthrows' {
+  declare function exports<T>(value: ?T): T;
+}

types/prop-types.js

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+// flow-typed signature: 3eaa1f24c7397b78a7481992d2cddcb2
+// flow-typed version: a1a20d4928/prop-types_v15.x.x/flow_>=v0.41.x
+
+type $npm$propTypes$ReactPropsCheckType = (
+  props: any,
+  propName: string,
+  componentName: string,
+  href?: string) => ?Error;
+
+declare module 'prop-types' {
+  declare var array: React$PropType$Primitive<Array<any>>;
+  declare var bool: React$PropType$Primitive<boolean>;
+  declare var func: React$PropType$Primitive<Function>;
+  declare var number: React$PropType$Primitive<number>;
+  declare var object: React$PropType$Primitive<Object>;
+  declare var string: React$PropType$Primitive<string>;
+  declare var any: React$PropType$Primitive<any>;
+  declare var arrayOf: React$PropType$ArrayOf;
+  declare var element: React$PropType$Primitive<any>; /* TODO */
+  declare var instanceOf: React$PropType$InstanceOf;
+  declare var node: React$PropType$Primitive<any>; /* TODO */
+  declare var objectOf: React$PropType$ObjectOf;
+  declare var oneOf: React$PropType$OneOf;
+  declare var oneOfType: React$PropType$OneOfType;
+  declare var shape: React$PropType$Shape;
+
+  declare function checkPropTypes<V>(
+    propTypes: $Subtype<{[_: $Keys<V>]: $npm$propTypes$ReactPropsCheckType}>,
+    values: V,
+    location: string,
+    componentName: string,
+    getStack: ?(() => ?string)
+  ) : void;
+}