Fix issue where collapse animation is really slow
Fix issue where last group does not collapse properly

There is an issue where the last group does not collapse properly if the AnimatedExpandableListView is inside a ViewGroup with the property WRAP_CONTENT as the layout width.
Merge pull request #15 from idunnololz/idunnololz/fix_expanding_in_wrap_content_layout

Idunnololz/fix expanding in wrap content layout