Automatically sign git commits

Signed-off-by: Michael Barton <mail@michaelbarton.me.uk>
Update git signoff key

Signed-off-by: Michael Barton <mail@michaelbarton.me.uk>
Add paredit vim plugin

Signed-off-by: Michael Barton <mail@michaelbarton.me.uk>
GPG sign git commits
Update dictionary
Further email signature
Add rdoc vim plugin