Merge pull request #2 from redtrine/feature/queue

add queue structure
[HashMap] Added hashmap structure.
[Hash] Move Countable and IteratorAggregate methods to hashmap
Merge branch 'master' of github.com:redtrine/redtrine
adding keypair structure... to be discussed
Merge pull request #4 from redtrine/keypair

Keypair Structure merged....but still some pending issues :D