Map stack items now have a max key size. We need to make sure that anywhere that we set key-value pairs in map stack items the key has to be sliced if it's too large. And then all key lookups need to slice the key the same way before doing the lookup. This is handled by the SliceKeyHelper and may have even been done everywhere. But this issue is to check to make sure it's implemented correctly a

After #326 is done we can make a Debian package. Make sure to add a man page for neo-go to comply with Debian policy.