Drawing text

There are 3 types of text drawing functions:

1. draw_text_*: for basic text drawing.
2. draw_multiline_text_*: for properly drawing text with newlines in it.
3. draw_wrapped_text_*: for drawing text with a max width, that wraps when it gets to the edge.

There are also equivalent functions for measuring the area text will take up when drawn.

See: /examples/text.rs