Update Javascript parser to recast + esprima

custom_typings/main.d.ts

@@ -2,3 +2,4 @@
 /// <reference path="./espree.d.ts" />
 /// <reference path="./estree.d.ts" />
 /// <reference path="./strip-indent.d.ts" />
+/// <reference path="./recast.d.ts" />

custom_typings/recast.d.ts

@@ -0,0 +1,32 @@
+declare module 'recast' {
+  import * as estree from 'estree';
+
+  export interface File {
+    name: string;
+    program: estree.Program;
+  }
+
+  export interface Options {
+    quote?: 'single'|'double'|'auto';
+    wrapColumn?: number;
+    tabWidth?: number;
+  }
+
+  export interface ParseOptions {
+    parser?: {parse(code: string): any}, tabWidth?: number, useTabs?: boolean,
+        reuseWhitespace?: boolean, lineTerminator?: string, wrapColumn?: number,
+        sourceFileName?: string, sourceMapName?: string, sourceRoot?: string,
+        inputSourceMap?: string, range?: boolean, tolerant?: boolean,
+        quote?: 'single'|'double'|'auto', trailingComma?: boolean|{
+          objects?: boolean,
+          arrays?: boolean,
+          parameters?: boolean,
+        },
+        arrayBracketSpacing?: boolean, objectCurlySpacing?: boolean,
+        arrowParensAlways?: boolean, flowObjectCommas?: boolean,
+  }
+
+  export function parse(source: string, options?: ParseOptions): File;
+
+  export function print(node: estree.Node, options?: Options): {code: string};
+}