Update speeddating to latest version
Add speeddating format for latex-suite templates
Remove ; to : map

Someone recommended mapping ; to : to save a key-press every time you
want to use a command. While this was useful, I didn't realise that ;
provides a function (repeating a find [f/F] or till [t/T]) which I also
only discovered recently anyway. Since I use find and till quite a lot
now it's much more useful for me to have the default functionality back
than to save a key-press entering command mode.
Remove redundant maps for working with diffs

I didn't realise that 'dp' (normal mode :diffput) and 'do' (normal mode
for :diffget) were normal mode commands and kept trying to enter them in
command mode. That's why I wrote the redundant command mode maps d< and
d>. My bad...