Merge branch 'hotfix/website'
update website + fix arrays snippet html file
add link to Play store & Android Arsenal
Merge branch 'develop'
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