clarify c2v / cpp2v and make example compile on latest v

[shadowninja55]

No description provided.

[ghost]

Good small edit but still necessary:

      <h2>C translation (wip)</h2>
      <p>V can translate your entire C project (wip) and offer you the safety, simplicity, and 10-25x compilation speed-up. </p>
      <h2>C and C++ translation (wip)</h2>
      <p>V can translate your entire C or C++ project (wip) and offer you the safety, simplicity, and 10-25x compilation speed-up. </p>