Added a limit argument to findKeys and findKeysBetween for #21
Added an offset argument before limit to findKeys and findKeysBetween for #21
Added countKeys and countKeys between which are a lot more efficient, especially on large chunks
Added iterators and reverse iterators
Bump to 0.5.0
Update README.md for counting, offset, limit and iterators
Added the possibility to retrive a batch of keys from an iterator
Update README.md
Iterate using foreach for keysIterator* operations
update gradle
update documentation
Merge branch 'feature/iterators' into develop
Refactored iterator to force to iterate over key batch
Closing directly upon reaching the end of the iterators (not when asked if there are more)
Update README.md for batch iterators
Merge pull request #24 from SalomonBrys/batch-iterator

Batch iterator
add test case
update doc + fix gradle javadoc generation
Merge branch 'release/0.5.0'