* Added checks everywhere for CachedValue::construct.
* Enforce 16MiB limit on keys and 4GiB limit on values.
* Protected members behind function calls in anticipation of format change.
* Shrunk CachedValue struct.
* Fixed alignment of CachedValues.
* Fixed improper comparison.
* Augmented cache API and fixed a potential deadlock scenario.
* The RocksDBEdgeIndex now tries to read up to 10 times form the cache on lock_timeout. Instead of rewriting everything after first attempt