Update SBT and library dependencies to the latest
Flatten result of LRANGE
Separate list operation tests
Fix error with empty multi bulk result
Fix LRANGE example in README.md
Test cleanup with lastest Scalatest snapshot

- Handle async assertions properly (with latest Scalatest snapshot)
- Shutdown actorsystem after tests are done
- Added `RedisSpecBase` for common test setup
Remove redundant Option from result
More test cleanup
Added tests
Fix more async tests
Fix HDEL with multiple keys
Fix Boolean result from Long value
Add KeyOperations test
Fix DEL, RANDOMKEY
Add SetOperations test
Fix SREM, SMOVE
Fix some SortedSet commands, added tests
Merge pull request #3 from guersam/tmp/flatten-unnecessary-option

Remove more Option[_] from result