Added LICENSE declaration file

LICENSE.txt

@@ -0,0 +1,33 @@
+The font Notalot35 (notalot35.ttf) by "NAL" (nalgames.com) is licensed under a 
+Creative Commons Attribution License (http://creativecommons.org/licenses/by/3.0/).
+
+All other assets (images, sound, text) are copyright 2014 Tangram Games
+and are licensed under Creative Commons Attribution 4.0 license
+(http://creativecommons.org/licenses/by/4.0/).
+
+All source code with the exception of `slam.lua` and `AnAL.lua` is copyright 2014
+and licensed under the ZLIB license included below.
+
+slam.lua and AnAL.lua are licensed under the MIT license.
+See the respective source files for license information.
+
+Safety Blanket source code license
+==================================
+
+Copyright (c) 2014 Tangram Games
+
+This software is provided 'as-is', without any express or implied
+warranty. In no event will the authors be held liable for any damages
+arising from the use of this software.
+
+Permission is granted to anyone to use this software for any purpose,
+including commercial applications, and to alter it and redistribute it
+freely, subject to the following restrictions:
+
+1. The origin of this software must not be misrepresented; you must not
+   claim that you wrote the original software. If you use this software
+   in a product, an acknowledgement in the product documentation would be
+   appreciated but is not required.
+2. Altered source versions must be plainly marked as such, and must not be
+   misrepresented as being the original software.
+3. This notice may not be removed or altered from any source distribution.