Gradle project file.

Adds a gradle project file so that other projects can use the
volly library.

Change-Id: I22d68fff50f9073474eb6be692bf7cbd08a366ea
Fix target package name so tests run.
Merge "Fix target package name so tests run."
Add a test for DiskBasedCache.

Change-Id: I8106e5763df7e600c82c446b6ff828907fb187c1
Merge "Add a test for DiskBasedCache."
Port CacheHeader away from ObjectOutputStream.

The standard Java serialization system relies heavily on
reflection, even for primitive types and Strings, which
generates a lot of garbage. Move to a simple built-in
implementation.

Change-Id: I7f35cbfd1963f2aaf726f5b747cef1b2f8a0ad69
Merge "Port CacheHeader away from ObjectOutputStream."
Merge remote-tracking branch 'clone/master'