Generally improved instructions. Added a "security checklist" which
helps to check for a few important security features, e.g. modern
javascript crypto support in browser. Merged in a few recent code
changes from bitaddress.org.
The "Print Front" tab now includes a link to disable random address
generation so you supply your own key or vanity address. An ubuntu font
is now embedded. All cryptographic javascript functions were re-copied
over from bitaddress.org to make doing a "diff" easier, since
bitaddress recently overhauled its code formatting.
Made buttons more button-like, clarified instructions, and added a PGP
signature for the generator (along with instructions on how to validate
the .sig file.)
