Added
- `create_collection` function
Changed
- Fixed the issues 20 and 22.
- Changed the behavior of the `copy_collection` function. Previously it would copy only the content of the source collection, but now copies the contents together with source collection itself.
In other words, now a new collection with the same name as the source collection is created in the destination and the content of the source collection is copied into it.
- Improved the function `make_json`.