Chris view holder

- Added SectionArrayAdapter
- Added NonSectioningArrayAdapter
- updated SectionCursor adapter to use ViewHolders.
- Added OnItemClickListeners for each adapter. 
- Updated ReadMe and Tests.

2.0 will not yet be published on maven. There will be one more pull request which will compare the methods betweened the adapters and make sure they are named and documented in the same way.
I see a lot more m prefixes. Did this originate from a source we should credit?