Merge pull request #2 from seancarr/master

add MemoryBoundLruHashMap
Merge pull request #3 from seancarr/master

update test to reflect containsKey() behavior change
Merge pull request #4 from seancarr/master

throw exception if key or value estimators aren't provided when using a ...
Merge pull request #5 from seancarr/master

add adjustNumManagedBytes() and other methods to handle case where objec...