make authors+license clear; fix typo

git-svn-id: https://svn.osgeo.org/grass/grass/trunk@40296 15284696-431f-4ddb-bdfa-cd5b030d7da7

lib/external/README.license

@@ -14,3 +14,19 @@ licensed under the GPL. Check the READMEs and source code header
 comments carefully.
 
 
+
+ * bwidget/ (LGPL 2.1)
+   BWidget Tcl/Tk ToolKit 1.2.1
+   Copyright (c) 1998-1999 UNIFIX.
+
+
+ * ccmath/ (LGPL 2.1)
+   CCMATH mathematics library version 2.2.1
+   Copyright (C) 2000 Daniel A. Atkinson
+
+
+ * shapelib/ (MIT/X)
+   Shapefile read/write functions.
+   Copyright (c) 2007, Frank Warmerdam
+
+

lib/external/ccmath/ccmath.h

@@ -5,7 +5,7 @@
  *  public license (LGPL). ( See the lgpl.license file for details.)
  *
  * Modified by Soeren gebbert 2009/01/08
- * Removed al unued functions in grass. Only the linear algebra
+ * Removed al unused functions in GRASS. Only the linear algebra
  * functions are used. 
  * ------------------------------------------------------------------------
  */