updates install_b3d.bat to include license prompt

win64/LICENSE

+The MIT License (MIT)
+
+Copyright (c) 2017 Balint Balazs
+
+Permission is hereby granted, free of charge, to any person obtaining a copy of
+this software and associated documentation files (the "Software"), to deal in
+the Software without restriction, including without limitation the rights to
+use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies
+of the Software, and to permit persons to whom the Software is furnished to do
+so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in all
+copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+SOFTWARE.
+
+
+CUDA (r)
+
+This distribution includes CUDA(r) binary libraries under the terms of Chapter 1
+of the End User License Agreement for the NVIDIA(r) CUDA(r) Toolkit, found at
+https://git.embl.de/balazs/B3D/CUDA_EULA.pdf. Users agree to the terms of that
+license, including the following restrictions:
+
+the Redistributable SOFTWARE shall be distributed solely in binary form to
+Licensee's licensees ("Customers") only as a component of Licensee's own
+software products (each, a "Licensee Application")
+
+Licensee shall design the Licensee Application such that the Redistributable
+SOFTWARE files are installed only in a private (non-shared) directory location
+that is used only by the Licensee Application;
+
+Licensee shall obtain each Customer's written or clickwrap agreement to the
+license terms under a written, legally enforceable agreement that has the
+effect of protecting the SOFTWARE and the rights of NVIDIA under terms no less
+restrictive than this Agreement.

win64/install_b3d.bat

 @echo off
 
+type LICENSE
+echo(
+:ask
+echo Please take a moment to read the above license agreement now. Do you
+echo agree, and wish to proceed with the installation? (Y/N)
+set INPUT=
+set /P INPUT=%=%
+If /I "%INPUT%"=="y" goto yes 
+If /I "%INPUT%"=="n" goto no
+goto ask
+:yes
 set folder=%~dp0
 IF %folder:~-1%==\ SET folder=%folder:~0,-1%
 rem echo %folder%
@@ -9,11 +20,21 @@ if defined HDF5_PLUGIN_PATH (
 	if "%folder%"=="%HDF5_PLUGIN_PATH%" (
 		echo Everything is already set up.
 	) else (
-		echo Copying dlls to %HDF5_PLUGIN_PATH%
-		copy /-Y "%folder%\*.dll" "%HDF5_PLUGIN_PATH%"
+		if exist "%HDF5_PLUGIN_PATH%" (
+			echo Copying dlls to %HDF5_PLUGIN_PATH%
+			copy /-Y "%folder%\*.dll" "%HDF5_PLUGIN_PATH%"
+		) else (
+			echo HDF5_PLUGIN_PATH is defined, but location is not found. Setting it to current directory.
+			setx HDF5_PLUGIN_PATH "%folder%"
+		)
 	)
 ) else (
 	echo HDF5_PLUGIN_PATH not defined. Setting it to current directory.
 	setx HDF5_PLUGIN_PATH "%folder%"
 )
+echo B3D is successfully installed.
+goto end
+:no
+echo Quitting installation.
+:end
 pause
\ No newline at end of file