Add coursier.bat script

coursier.bat

@@ -0,0 +1,29 @@
+@REM https://github.com/xerial/sbt-pack/blob/master/src/main/templates/launch-bat.mustache
+@REM would be worth getting more inspiration from
+
+@echo off
+
+SET ERROR_CODE=0
+
+SET LAUNCHER_PATH=%~dp0/coursier
+
+IF NOT EXIST %LAUNCHER_PATH% (
+  bitsadmin /transfer "DownloadCoursierLauncher" https://github.com/alexarchambault/coursier/raw/master/coursier %LAUNCHER_PATH%
+)
+
+SET CMD_LINE_ARGS=%*
+
+java -jar %LAUNCHER_PATH% %CMD_LINE_ARGS%
+
+IF ERRORLEVEL 1 GOTO error
+GOTO end
+
+:error
+SET ERROR_CODE=1
+
+:end
+SET LAUNCHER_PATH=
+SET CMD_LINE_ARGS=
+
+EXIT /B %ERROR_CODE%
+