announcing darcs 2.0.0pre1, the first prerelease for darcs 2

[Simon Marlow]

A small UI issue:

$ darcs2 get http://darcs.haskell.org/ghc-darcs2

darcs failed:  Incompatibility with repository 
http://darcs.haskell.org/ghc-darcs2:
Cannot mix darcs-2 repositories with older formats


Since I'm trying to get a darcs-2 format repository, I would expect it to 
just work, and give me a darcs-2 copy of it, without having to specify 
--darcs-2.

Cheers,
	Simon