Merge pull request #2 from SponsorPay/master

Accepting any amount in incrementals
v0.3.1
Return empty hash when no keys are passed to the Storage#count method
Fix memcache wrapper tests
Fix storage tests
Merge pull request #3 from valakirka/manage_no_keys_for_count

Return empty hash when no keys are passed to the Storage#count method
v0.3.2
Added pick functionality