Swap example to Support Library Action Bar.
Alternate method for forcing even rows.
Modify example for traditional row measuring.

Depending on the scroll direction, the vanilla GridView determines its
row height from the first and the last item. This means item height must
be constant across the row.
Bump to API 18
Restore Stickied Header.

Accidental reformat too :(
Performance fixes. Fixes #32 and also resolves #30.

Don't use ReferenceViews. Id Header Fillers separate from standard
Fillers. Remove poorly functioning measurement hack to force dynamic row
height support. Change Fillers that mimic measured height of the most
recent 'real' or header item; depending on the type.

Coincidentally the changes also mean client views are no longer detached
prematurely.
Remove debug color drawing.
Minor performance tweaks.
Fix performance jitter caused by header draw alpha.