🔖 set version to 3.1.0

- updated documentation wrt. new repository layout
- temporarily switched off Homebrew --HEAD building (can only be switched on after release)
- set copyright date to 2018

single_include/nlohmann/json.hpp

@@ -1,11 +1,11 @@
 /*
     __ _____ _____ _____
  __|  |   __|     |   | |  JSON for Modern C++
-|  |  |__   |  |  | | | |  version 3.0.1
+|  |  |__   |  |  | | | |  version 3.1.0
 |_____|_____|_____|_|___|  https://github.com/nlohmann/json
 
 Licensed under the MIT License <http://opensource.org/licenses/MIT>.
-Copyright (c) 2013-2017 Niels Lohmann <http://nlohmann.me>.
+Copyright (c) 2013-2018 Niels Lohmann <http://nlohmann.me>.
 
 Permission is hereby  granted, free of charge, to any  person obtaining a copy
 of this software and associated  documentation files (the "Software"), to deal
@@ -30,8 +30,8 @@ SOFTWARE.
 #define NLOHMANN_JSON_HPP
 
 #define NLOHMANN_JSON_VERSION_MAJOR 3
-#define NLOHMANN_JSON_VERSION_MINOR 0
-#define NLOHMANN_JSON_VERSION_PATCH 1
+#define NLOHMANN_JSON_VERSION_MINOR 1
+#define NLOHMANN_JSON_VERSION_PATCH 0
 
 #include <algorithm> // all_of, find, for_each
 #include <cassert> // assert
@@ -10515,7 +10515,7 @@ class basic_json
                     object = nullptr;  // silence warning, see #821
                     if (JSON_UNLIKELY(t == value_t::null))
                     {
-                        JSON_THROW(other_error::create(500, "961c151d2e87f2686a955a9be24d316f1362bf21 3.0.1")); // LCOV_EXCL_LINE
+                        JSON_THROW(other_error::create(500, "961c151d2e87f2686a955a9be24d316f1362bf21 3.1.0")); // LCOV_EXCL_LINE
                     }
                     break;
                 }