[MonoDevelop] New snap, new stuff

[Todd Berman]

Well, I just updated the snapshot (r1255) and it contains some new
stuff.

first of all, the code completion window can be turned off with an
option in the option panel.

because of this, we needed a way to trigger code completion.

if you hit ctrl+space now, MD will attempt to code complete.

the behaviour (should be) as follows:

if one match 
	fill without showing dialog
else
	select first match, show dialog

please test and file bugs on this new stuff, as we are planning on
releasing 0.2 soonish.

--Todd