Small fixes to project site

[goobertron]

I've just noticed a small error that has crept in: on the About page, under Freedom, on the blue 'Find out more' button the HTML code for the right angle quotes is appearing in the page as »

Also, when you click the 'Join Diaspora*' button, it jumps to the sign up section fine, but the title is obscured by the black bar. All the other intra-links seem fine.

I have made this pull request, which I believe fixes this. Would be grateful if someone would check it for me.

Thanks