v3.4.0 - The Rusty Release

Major improvements:

The C helper module has been reimplemented in Rust and other performance critical functions have also been moved to the Rust module. (Specifically, the Parsing logic and the loop string formatting logic.) Additional effort towards maximizing the performance of the Rust module has been made, leading to massive speedups in performance of common actions.

• Parsing a file is now nearly twice as fast.
• Rendering an Entry to a string is now nearly three times as fast.

This change is tested to be and understood to be fully backwards compatible, but due to the major nature of the change is getting a new minor version number.