Adding rake sln to launch sln file

Author: aaronjensen

RakeFile

@@ -213,4 +213,11 @@ task :coverage_for_inspection_dsl do
 					                        '.*\.AcceptVisitor',     # AcceptVisitor
 											'.*\.I.*Alteration\..*'] # Any IXAlteration explicit implementations
   ncover.run
-end
+end
+
+desc "Open solution in VS"
+task :sln do
+  Thread.new do
+    system "devenv src/FluentNHibernate.sln"
+  end
+end