initial commit
add test libraries
change bower installation directory
add basic functionality
only allow cache of seriazable values
add Item#isMiss
add Ephemeral#Delete
add Item#clear
accept expiration date
refactor item#get to use reduce
refactor tests to dinamically test all drivers
abstract some driver logic into Stash::Drivers::Utils
fix Stash::Drivers::Utils#assemble test to use fix date, prevent depending on execution time
add flush cache before tests
add localStorage driver
add basic lock function
fix typo
move calculation of expiration date to Item
test behavior of default cache policy
remove dump, fix cache expiration and reorder steps