HashTrieEngine: multithreading bug with MessageDigest was fixed. Now it's not static
ShardingNode: some extra synchronizations and 'isRunning' checks were added
Stress-testing 'perform a random action' method was moved to AbstractStressTest and is now used both in FileStorableDbEngineTest and ShardingTest. In the latter there is a separate algos for stressTest and multithreadedStress test with different constants
INSTALL.md