Caffeine – Java 8 caching

* Benchmarks: https://github.com/ben-manes/caffeine/wiki/Benchmarks

* Design: https://github.com/ben-manes/caffeine/wiki/Design

This is an evolution of two previously successful caching libraries:

* ConcurrentLinkedHashMap: https://code.google.com/p/concurrentlinkedhashmap/

* Google Guava's Cache: https://github.com/google/guava