fixed reflection problem by applying SecurityRules attribute to FNH main assembly

Author: chester89

src/FluentNHibernate/Properties/AssemblyInfo.cs

@@ -7,4 +7,5 @@
 // associated with an assembly.
 [assembly: AssemblyTitle("FluentNHibernate")]
 [assembly: AssemblyDescription("")]
-[assembly: CLSCompliant(true)]
+[assembly: CLSCompliant(true)]
+[assembly: System.Security.SecurityRules(System.Security.SecurityRuleSet.Level1)]