Assert on llen.
Assert on lpush.
Assert on lpop and rpop.
Improve lpush/rpush assertions.
Assert on lrem.
Assert on lset.
0.1.40
Assert on ltrim.
Assert on lrange.
0.1.41
Assert on linsert.
Assert on rpoplpush.
0.1.42
Create destination list in rpoplpush.
0.1.43
Return 0 on linsert with missing key.
0.1.44
Fix ltrim/lrange, always increment stop.
0.1.45