library
- allow to chain the ItemFilterListener -> rename it to withItemFilterListener
- add new function to provide a Comparator inside an ItemAdapter. This will automatically sort the list as soon as new items are added or set
- FIX #51
- update javadoc inside the IItemAdapter
- add new method to get the count of expandable items before a specific position
general
- update to gradle 2.11
- update to latest andrdoid build tools