Documentation of the API could be more helpful

[bruce-hill]

The README says "Termbox's interface only consists of 12 functions", which is not really accurate (there's 21 functions), and lists just the function names. I think it would be helpful to give argument names (e.g. tb_change_cell(x, y, ch, fg, bg) instead of just tb_change_cell()) and either list all 21 functions, or explicitly say that the listed functions are only the most commonly used ones, but the API has a some other functions too.

[osa1]

In addition, it'd be helpful to mention the expected encoding of chars in tb_change_cell. I think it's wchar_t (because the value is later passed to wcwidth()) but maybe I'm missing something because the actual type is uint32_t instead of wchar_t, perhaps for a reason.