gdlib 0.3.3

Rust library for editing Geometry Dash savefiles
Documentation
# Contributing
Thanks for wanting to contribute! All contribution must be made through a pull request. Please see the respective section below for your type of contribution.

## Bug report
- Include a short title, preferably one sentence long, that is informative of the core issue.
- In the description, state exactly what went wrong to the best of your ability.
- If applicable, please provide the program output. 
- Please ensure that your code passes `cargo test` and that `cargo clippy` emits no warnings or errors.

## Feature request
- Title the PR: "Feature Request: \<your feature>"
- Please provide:
    - a brief summary of the feature
    - what you would like to see from it as a result
    - any necessary details of implementation

## Other
- Describe your suggestion briefly and informatively in the title
- Provide as much detail as you want in the description, but please provide enough so that the maintainer(s) understand the core of the request.