Added build.xml and proguard.cfg (generated with "android update project" command)
build.xml is necessary to build a project that links against HockeyKit from the command line (or jenkins CI) using ant
Merge remote-tracking branch 'upstream/develop' into develop
Fix for updates on SonyEricsson XPERIA mini pro

On the SE XPERIA mini pro, Settings.Secure.getString(activity.getContentResolver(), Settings.Secure.ANDROID_ID) returns null which in turn causes a null pointer exception in URLEncoder.encode()

If the udid is not available it is not sent to the server
Make CrashManager.registerHandler() public so that it can be called from Application.onCreate() in order to catch crashes that occur when the app is started via a broadcast receiver
Merge pull request #127 from alexbirkett/develop

Develop