v0.2

• Add BackendWrap to streamline making simple Backends that only need to override a few methods.
• Short circuit getMultiple for empty keys to avoid unnecessary work.
• Add Memcached backend for use with the PECL Memcached extension.
• Add deleteMultiple to simplify deleting many keys.

Initial Release

composer.json: Fix name for packagist

It can't contain uppercase characters.