More typing

[Daniel van Vugt]

Looking at an example of changing from the old input event API to the 
new one in Mir 0.10:

http://bazaar.launchpad.net/~mir-team/mir/development-branch/revision/2246?compare_revid=2128#examples/fingerpaint.c

You can see it requires a lot more code now.

I'm wondering if anyone has any thoughts on how we might make things 
simpler for users again before this becomes the norm...?

- Daniel