Updated copyright year (2015 -> 2018), moved full license to json.lua

LICENSE

@@ -1,4 +1,4 @@
-Copyright (c) 2015 rxi
+Copyright (c) 2018 rxi
 
 
 Permission is hereby granted, free of charge, to any person obtaining a copy of

json.lua

@@ -1,10 +1,25 @@
 --
 -- json.lua
 --
--- Copyright (c) 2015 rxi
+-- Copyright (c) 2018 rxi
 --
--- This library is free software; you can redistribute it and/or modify it
--- under the terms of the MIT license. See LICENSE for details.
+-- Permission is hereby granted, free of charge, to any person obtaining a copy of
+-- this software and associated documentation files (the "Software"), to deal in
+-- the Software without restriction, including without limitation the rights to
+-- use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies
+-- of the Software, and to permit persons to whom the Software is furnished to do
+-- so, subject to the following conditions:
+--
+-- The above copyright notice and this permission notice shall be included in all
+-- copies or substantial portions of the Software.
+--
+-- THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+-- IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+-- FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+-- AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+-- LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+-- OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+-- SOFTWARE.
 --
 
 local json = { _version = "0.1.0" }