Replace Ascii Art in "Basic terminology: Crates and Modules"

[killercup]

This doesn't render well in PDF or EPUB as it may be broken across multiple pages or line wrapped.

We could replace this with either a plain list like this:

Phrases

• English
  • Greetings
  • Farewells
• Japanese
  • Greetings
  • Farewells

or with a graphic (using graphviz, e.g.). The latter would look better but also requires us to deal with image format support of various devices (PDF for LaTeX, SVG for HTML and some eReaders, PNG for the rest).

[hainuo]

i have changed the font name used in build.rb when i run ruby build.rb to render a chinese base book. the question you asked i have no idea