Contributing

What should I know before contributing?

The main focus of this project is an intuitive and easy-to-use design.
Naming conventions are pretty straightforward: Classes, enums, etc. shall be CamelCase, anything else shall be snake_case. Private and protected member variables shall have the m_ prefix. A getter for a private or protected variable shall be the variable name without the m_ (no get_ prefix). Setters shall have the set_ prefix. (just look at the code, its really straightforward)
Choose clear and descritive names with as little abbreviation as possible.

In general, contribute anything that would be useful to you. Keep in mind that feature-rich != bloated.

In more detail:

Any optimization is welcome (as long as it doesn't break something important).
Useful overloads for existing features are welcome.
Documentation. Basically every public method needs to be documented at some point. Documentation can be very detailed, as long as it does not go into too much detail about the implementation.