Changes with v0.9.5

 *) Update icons to match native application. [Graham Leggett]

 *) Messages involving disconnection carry no UUID, make sure
    we don't reject these messages. [Graham Leggett]

 *) Distinguish between the native app having handled at least
    one message and disconnected, and the native app not having
    been installed at all. [Grahamm Leggett]

Changes with v0.9.4

 *) Initial import of redwax-signtext-firefox. [Graham Leggett]