v2.0.0

This new release updates pretty much everything in the code generator system.
The new implementation is focused on versatility and makes custom code generation easy. It is also possible to make a generator use different code generation modules in a few lines.

I haven't kept track of every single change I did since I pretty much reworked everything, so you can consider this new version as a whole new code generator library.

I still have a bunch of other major changes in mind that might bring this library to 3.0.0. Beyond them, I want to make it possible to generate code anywhere from any entity, and not be restricted by the location of the generating entity (for example, if we want to insert generated code at a very specific location in the generated file from any entity). This is probably the greatest limitation in the current implementation.
However, I will probably not have much free time right away so I plan to maintain the current version (v2.x.x) until then.