Updates and organizes main LICENSE.txt.

Adds new LICENSE.txts for /libraries and /source/tools. Refs #1682

This was SVN commit r13121.

LICENSE.txt

@@ -14,24 +14,6 @@ the file's path.
 Some files don't yet have licensing details specified - if you care about any
 in particular, let us know and we can try to clarify it.
 
-  /source
-    GPL version 2 (or later) - see license_gpl-2.0.txt
-
-  /source/lib
-    MIT
-
-  /source/third_party/mikktspace
-    zlib
-
-  /source/third_party/mongoose
-    MIT
-
-  /source/tools
-    Various (unspecified)
-
-  /source/tools/atlas
-    GPL version 2 (or later) - see license_gpl-2.0.txt
-
   /binaries/data
     GPL version 2 (or later) - see license_gpl-2.0.txt
 
@@ -48,11 +30,35 @@ in particular, let us know and we can try to clarify it.
     Proprietary - see license_dbghelp.txt for restrictions you must agree to
     before distributing this particular file
 
-  /libraries
-    Various - see individual directories and files for details
-
   /build
     Various (unspecified)
 
+  /build/premake/premake4
+    BSD
+
+  /build/premake/*.lua
+    MIT
+
   /docs
     Various (unspecified)
+
+  /libraries
+    Various - see LICENSE.txt within that directory
+
+  /source
+    GPL version 2 (or later) - see license_gpl-2.0.txt
+
+  /source/lib
+    MIT
+
+  /source/third_party/mikktspace
+    zlib
+
+  /source/third_party/mongoose
+    MIT
+
+  /source/tools
+    Various - see LICENSE.txt within that directory
+
+  /source/tools/atlas
+    GPL version 2 (or later) - see license_gpl-2.0.txt

libraries/LICENSE.txt

@@ -0,0 +1,56 @@
+This directory contains libraries that are used by the game, mostly 
+precompiled for Windows developers, but a few are bundled with source
+when the game requires a specific version that may not be available
+in package managers.
+
+  boost
+    Boost Software License
+
+  cryptopp
+    Crypto++ License (files are public domain)
+
+  cxxtest
+    LGPL v2.1 (see COPYING)
+
+  enet
+    MIT (see src/LICENSE)
+
+  fcollada
+    MIT (see src/FCollada/Copyright.txt)
+
+  libcurl
+    MIT
+
+  libjpg
+    libjpeg license
+
+  libpng
+    libpng license
+
+  libxml2
+    MIT
+    LGPL v2.0 (include/iconv.h)
+
+  nvtt
+    MIT (see src/NVIDIA_Texture_Tools_LICENSE.txt)
+
+  openal
+    LGPL v2.0
+
+  opengl
+    MIT
+
+  sdl
+    LGPL v2.1
+
+  spidermonkey
+    MPL / GPL / LGPL
+
+  valgrind
+    BSD
+
+  vorbis
+    BSD
+
+  zlib
+    zlib license

source/tools/LICENSE.txt

@@ -0,0 +1,73 @@
+This directory mostly contains tools that are not required to run 0 A.D., with
+the exception of Atlas, but they may be useful to some people. Those files authored
+by Philip Taylor are released under the MIT license.
+
+Some files don't yet have licensing details specified - if you care about any
+in particular, let us know and we can try to clarify it.
+
+  atlas
+    GPL version 2 (or later) - see license_gpl-2.0.txt
+
+  autobuild
+    MIT
+
+  autobuild2
+    Various (unspecified)
+
+  autolog
+	MIT
+
+  cmpgraph
+    MIT
+
+  dds
+    MIT
+
+  dist
+    MIT
+
+  entconvert
+    MIT
+
+  entdocs
+    MIT
+
+  entgraph
+    MIT
+	libjpeg (jpeg.dll)
+	libpng (png.dll)
+	zlib (z.dll)
+
+  entity
+    MIT
+
+  fontbuilder2
+    MIT
+	unspecified (FontLoader.py)
+    IBM CPL (Packer.py)
+
+  openlogsfolder
+    MIT
+
+  profiler2
+    MIT
+    MIT / GPLv2 (jquery-1.6.4.js)
+
+  replayprofile
+    MIT
+    MIT / GPLv2 (jquery.flot.navigate.js, jquery.js)
+
+  selectiontexgen
+    unspecified
+
+  springimport
+    MIT
+
+  templatessorter
+    MIT
+
+  textureconv
+    MIT
+
+  webservices
+    MIT / unspecified