Fix copyright date

Author: shana

src/common/SolutionInfo.cs

@@ -7,7 +7,7 @@
 [assembly: AssemblyFileVersion("1.99.0.0")]
 [assembly: ComVisible(false)]
 [assembly: AssemblyCompany("GitHub, Inc.")]
-[assembly: AssemblyCopyright("Copyright © GitHub, Inc. 2014-2015")]
+[assembly: AssemblyCopyright("Copyright © GitHub, Inc. 2014-2016")]
 [assembly: AssemblyConfiguration("")]
 [assembly: AssemblyTrademark("")]
 [assembly: AssemblyCulture("")]