fix String build in CollitLogData
fix clear Cache in Hash
add simple memory usage test
add ShortList & test for it
add OneElementList
fix memory usage
renamed graph subpackage
Commit.getData() => getParents()
fix commits tests
fix change Commit.getData()=>getParents()
but not fix CommitDataGetter & not fix new format input str
fix new format input str
make ProcessOutputReader not abstract & fix it usage
fix CacheCommitDataGetter
add CacheGet.addToCache(key, value)
add preload more commits
fix null commit in preLoad list
it happened, if row have empty commit