Move release notes around for v0.20.0.
v0.20.0
Remove support for vs2008.
Don't try to load the VS2008 adapter.
There can be only "Any CPU".
release notes.
Build "Any CPU" on travis.
Merge pull request #619 from spraints/so-long-vs2008

Remove support for VS2008
Update README for v0.20

Remove referencies to TFS2008 support...