Improve documentation around exists() vs. isHit().
Add a note regarding ArrayAccess, which is not used.
Add link to latest details poll.
PSR-2 Compliance + Fixed classname in doc
Coding standards fixes.
Clarify that keys must be at least one character long.
Add period to the minimum list of key characters.
Clarify that delete should return a status boolean.
Documentation tweak.
Pool::clear() should return boolean, not self.
Extra The
Fixed typo
Moved Calling Library and Implementing library definitions to the top of the list.