Corrected title and replaced twitter handle from title with a badge
Removes unused class load from tests
Adds stash as a dependency

Adds stash implementation and tests

Adds Readme for Stash cache
Merge pull request #279 from sagikazarmark/fixes

Removes unused class load from tests
Merge pull request #278 from sagikazarmark/feature/stash

Creates a cache implementation using Stash
Removed duplicate packagist link
Updated changelog