Merge branch 'release/0.5.0' into develop
fixing misleading typo in caching.unit.js reset() test
adding caching.keys() function (issue #6)
updating examples/redis_example/example.js with cache.keys() usage
Merge branch 'feature/get-all-keys' into develop
allow calling memory store get() without callback
release notes for 0.6.0
Merge branch 'release/0.6.0'