Reproduce problems of stored deserialization
Fix object store deserialized
Fix list stores deserialized
Prevent loosing root node while deserializing
Update changelog
Fix python3 octal number
Add comment about object validation
Support json for objects

Suggested by @Natim
Move json tests to separate file for layout consistency
Fix JSON as abstract mapping, but support list too
Merge pull request #256 from spiral-project/255_store_deserialized

Store deserialized version of nodes