add license and minor readme edit

LICENSE.txt

@@ -0,0 +1,18 @@
+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 acknowledgment 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.

readme.md

@@ -54,9 +54,8 @@ What it doesn't do.
 
 TinyXML-2 doesn't parse or use DTDs (Document Type Definitions) or XSLs
 (eXtensible Stylesheet Language.) There are other parsers out there
-that are much more fully featured. But they are also much bigger,
-take longer to set up in your project, have a higher learning curve,
-and often have a more restrictive license. If you are working with
+that are much more fully featured. But they are generally bigger and
+more difficult to use. If you are working with
 browsers or have more complete XML needs, TinyXML-2 is not the parser for you.
 
 TinyXML-1 vs. TinyXML-2