Fix for Tooltips for Unity 4.2
Fix for Tooltips for Unity 4.2

Unity v4.3 fixed an issue where "Editor: PropertyDrawers can now call
EditorGUI.PropertyField to get the default implementation instead of
getting infinite recursion."
(http://unity3d.com/unity/whats-new/unity-4.3).
Added work around for previous versions that doesn’t use
EditorGUI.PropertyField

Fixes #3

TJHeuvel/google-analytics-plugin-for-unity,timmy2702/google-analytics-plugin-for-unity,shazow/google-analytics-plugin-for-unity,shazow/google-analytics-plugin-for-unity,googleanalytics/google-analytics-plugin-for-unity,TJHeuvel/google-analytics-plugin-for-unity,TJHeuvel/google-analytics-plugin-for-unity,timmy2702/google-analytics-plugin-for-unity,shazow/google-analytics-plugin-for-unity,timmy2702/google-analytics-plugin-for-unity,googleanalytics/google-analytics-plugin-for-unity,TJHeuvel/google-analytics-plugin-for-unity,shazow/google-analytics-plugin-for-unity,timmy2702/google-analytics-plugin-for-unity,googleanalytics/google-analytics-plugin-for-unity,googleanalytics/google-analytics-plugin-for-unity