fix packager patch to auto-generate index.*.map files

- looks like in case of error RN tries to load index.ios.map, this file is normally generated by packager. Need to keep it this way.

README.md

@@ -257,9 +257,9 @@ Re-Natal makes almost no changes to the files generated by react-native so the o
 ### Changes Re-Natal does to original RN application
 It would be perfect not to do any changes there, but...
 * To make source maps available in "Debug in Chrome" mode re-natal patches
-the react native packager to serve \*.map files from file system.
-To do this [these lines are commented](https://github.com/facebook/react-native/blob/master/packager/react-packager/src/Server/index.js#L400-L401)
-in file "node_modules/react-native/packager/react-packager/src/Server/index.js"
+the react native packager to serve \*.map files from file system and generate only index.\*.map file.
+To achieve this [this line](https://github.com/facebook/react-native/blob/master/packager/react-packager/src/Server/index.js#L400)
+of file "node_modules/react-native/packager/react-packager/src/Server/index.js" is modified to match only index.\*.map
 
 ## Tips
 - Having `rlwrap` installed is optional but highly recommended since it makes

re-natal.coffee

@@ -235,9 +235,8 @@ updateGitIgnore = () ->
 
 patchReactNativePackager = () ->
   log "Patching react-native packager to serve *.map files"
-  edit "node_modules/react-native/packager/react-packager/src/Server/index.js", [
-    [/^(\s*requestType\s*=\s*'map'\s*;)$/m, "//$1"],
-    [/^(\s*}\s*else\s*if.*pathname\.match.*\.map.*\{)$/m, "//$1"]]
+  edit "node_modules/react-native/packager/react-packager/src/Server/index.js",
+    [[/match.*\.map\$\/\)/m, "match(/index\\..*\\.map$/)"]]
 
 init = (projName) ->
   if projName.toLowerCase() is 'react' or !projName.match validNameRx