Update version.rb

Version 1.0 was the long-working version of this library running on Ruby 1.8.7 on CentOS 5.x.  Version 2 is the new release running on Ruby 1.9.3 with updated versions of the SCM CLI's.

Author: Peter Degen-Portnoy

lib/scm/version.rb

@@ -1,5 +1,5 @@
 module Scm
   module Version
-    STRING = '0.0.1'
+    STRING = '2.0.0'
   end
 end