Added support for self-supplied keys (e.g. vanity addresses). Embedded fonts for more reliable printing.

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.