Final release: package now deprecated.

Move test helpers to separate package.

Fix detecting HTTP message body.

New HTTP client and some internal refactoring.

Refer to changelog for details.

Standard object moved to separate utility library.

Bug fixes and other internal changes. Refer to
changelog.

Remove request handler and per-resource type

store adapters

Fix docblocks

Add encoder with array serialization

Bugfixes and dependency updates.

Refer to changelog.

Add utility classes and traits