PH: BOOM! Accordion Control!
- Created a BaseControl for all future controls to inherit from.
- Added method in AccordionList to provide a groupView to the AccordionList instance.
- Created the AccordionListAdapter class, acts just like the previous expandablelistadapter but draws its collection and whatnot from the AccordionList parent
- Created methods in AccordionList and AccordionListItem to retrieve an element from a given index.
- Added IAccordionGroupView to allow you to provide a view for what the group views should look like.
- Added IAccordionItemView to allow you to provide a view for what the item views should look like.