Copyrights: update for 2015

Edward Thomson · Edward Thomson · commit 347a7725a1e7 · 2015-01-19T14:25:38.000-06:00
And by "update", I mean "drop occurrences of the year entirely",
so that we don't have to deal with this every 12 months.
diff --git a/LICENSE.md b/LICENSE.md
@@ -1,6 +1,6 @@
 The MIT License
 
-Copyright (c) 2011-2014 LibGit2Sharp contributors
+Copyright (c) LibGit2Sharp contributors
 
 Permission is hereby granted, free of charge, to any person obtaining a copy
 of this software and associated documentation files (the "Software"), to deal
diff --git a/LibGit2Sharp/Properties/AssemblyInfo.cs b/LibGit2Sharp/Properties/AssemblyInfo.cs
@@ -17,7 +17,7 @@
 #endif
 
 [assembly: AssemblyProduct("LibGit2Sharp")]
-[assembly: AssemblyCopyright("Copyright © 2011-2014 LibGit2Sharp contributors")]
+[assembly: AssemblyCopyright("Copyright © LibGit2Sharp contributors")]
 
 [assembly: CLSCompliant(true)]
 
