fixed: msi 32-bit and 64-bit should not be installed side by side, user should use the right arch.
fixed: msi duplicate installs when using different nightly build revs (probably a hacky fix).

git-svn-id: http://svn.synergy-foss.org/trunk@2002 33c40d52-04ba-11de-a43f-ff96a2b7a9af