Update appveyor binary distribution with MPL2.0 license source

.appveyor.yml

@@ -86,15 +86,23 @@ after_build:
     echo Built using %VS_GENERATOR% on %APPVEYOR_REPO_COMMIT_TIMESTAMP:~0,10% (build %APPVEYOR_BUILD_NUMBER%).>> Build.txt
     echo Commit id: %APPVEYOR_REPO_COMMIT%.>> Build.txt
     
-    7z a RmlUi-%VS_SHORTNAME%-%PLATFORM_NAME%.zip Bin/ Include/ Samples/ Build.txt readme.md changelog.md LICENSE.txt Dependencies/freetype-%FREETYPE_VER%/ Dependencies/rlottie/COPYING Dependencies/rlottie/licenses/
+    cd Dependencies/rlottie/
+    echo The rlottie library includes source code licensed under Mozilla Public License Version 2.0.> MPL_SOURCE.txt
+    echo The source for this code can be found in the rlottie library at the following URL:>> MPL_SOURCE.txt
+    echo https://github.com/Samsung/rlottie/blob/29b391b95913877b7234543da8b4a9ec6d8175d0/src/vector/vinterpolator.cpp.>> MPL_SOURCE.txt
+    cd ../..
+    
+    7z a RmlUi-%VS_SHORTNAME%-%PLATFORM_NAME%.zip Bin/ Include/ Samples/ Build.txt readme.md changelog.md LICENSE.txt Dependencies/freetype-%FREETYPE_VER%/ Dependencies/rlottie/COPYING Dependencies/rlottie/MPL_SOURCE.txt Dependencies/rlottie/licenses/
     
     mkdir Samples\Dependencies\freetype-%FREETYPE_VER%, Samples\Dependencies\rlottie, Samples\Dependencies\rlottie\licenses
     cp LICENSE.txt Samples/LICENSE.txt
     cp Include/RmlUi/Core/Containers/LICENSE.txt Samples/LICENSE.Core.ThirdParty.txt
     cp Source/Debugger/LICENSE.txt Samples/LICENSE.Debugger.ThirdParty.txt
     cp Dependencies/freetype-%FREETYPE_VER%/*.TXT Samples/Dependencies/freetype-%FREETYPE_VER%
     cp Dependencies/rlottie/COPYING Samples/Dependencies/rlottie
+    cp Dependencies/rlottie/MPL_SOURCE.txt Samples/Dependencies/rlottie
     cp Dependencies/rlottie/licenses/* Samples/Dependencies/rlottie/licenses
+    
     IF "%PLATFORM_NAME%"=="win64" 7z a RmlUi-%PLATFORM_NAME%-samples-only.zip .\Samples\* -r -xr!src\ -x!shell\ -x!luainvaders\
     
 for: