Merge pull request #23 from SaveTheRbtz/master

Speededup write path, revised iterator locking, introduced database lock and more.
v0.19.10
Fixed new base duplicated name leak
hash: fill eblob_hash_destroy()

Properly free all data allocated by hash itself and data in it.
Also renamed eblob_hash_exit() to eblob_hash_destroy() for consistency.