OgameAgent conversion to use Jsoup

The changes to let ogame-android-app use jsoup in OgameAgent.
Let's stick with just LongSparseArray here. The android v4 support library contains android.support.v4.util.LongSparseArray, which should provide better support for older devices (the non-support version of the class is unavailable until Android 4.1 Jelly Bean). You can get a reference to the v4 support library if you import the appcompat support library: https://developer.android.com/tools/support-library/setup.html