[pypy-dev] PyPy logo update

[Arseniy Terekhin]

Hi!

Let's update the logo to have `PyPy` instead of `pypy`.
Too see my idea go to http://pypy.org and execute this javascript
(Ctrl+Shift+J for Chrome, Ctrl+Shift+K for Firefox):

$('#header').prepend('<h1 class="title" style="position:
fixed;font-size: 350%;margin-top: 31px;margin-left: 152px;background:
white;width: 300px;height: 40px;color:black;">PyPy</h1>');

Any objection? If no then I'll make a pull request.

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Best regards,
Arseniy Terekhin