Use ThreadLocal StringBuilder, no iterator on batch delivery.
Merge pull request #377 from square/dimitris/threadlocal

Use ThreadLocal StringBuilder, no iterator on batch delivery.
No iterator on joined requests, minor javadoc fix.
Merge pull request #378 from square/dimitris/tiny

No iterator on joined requests, minor javadoc fix.
Change file path to abstract representation.

The actual file passed is an implementation detail and using a real example would only serve to clutter showcasing the actual Picasso API.

We also don't want to give users the wrong idea in thinking that we support loading animated GIFs. Or humor.
Merge pull request #381 from square/jw/are-you-effing-serious

Change file path to abstract representation.
Use icon for sample app, use target 19.
Merge pull request #382 from square/dimitris/icons

Use icon for sample app, use target 19.