removed method removeExpiredFiles()
added method for generate cache hash. set expire time in constructor
refactoring
add method load()
realised save and load data from cache
removed private property
code
code
use sha1() for generate cache has
README.md
some changes
removed param from method generateCacheHash()
code style: tabulation
code style: tabulation
fixed bugs with write and read cache
realized method drop cache
code refactoring