Fix storyboard segues on iOS < 6.0 (closes #121)
Added comment describing downsides of the current implementation
Selection segue is triggered only after the corresponding index path has been added to the _indexPathsForSelectedItems
Fix assertion on deleting and moving same item
Fix assertion message typo
Fix move operations when batched with deletes

Since deletes happen before moves, indexPathBeforeUpdate.item may no
longer point to correct index, so search for the object we're looking
for and use its index.
Add batch update example app
Merge pull request #295 from aburgel/move_fixes

Fix batch updates with NSFetchedResultsController assertions
update podspec
[podspec] Update source tag and remove superfluous public headers.

By default all headers in the `source_files` are assumed to be public.
small fix in README.md
Merge pull request #298 from willpragnell/master

Small fix in README.md
fixed #292 enable the allowsSelection property
Merge pull request #300 from darcyliu/master

Fix issue #292
Merge pull request #284 from advantis/master

Fix storyboard segues on iOS < 6.0
Fixes an issue if the grid delegate was set to the grid
formatting
Improve segue calling
Fixed problem with applied LayoutAttributes (fixes #225)
Fix a few typos in README.md