Fix script so that it works on Linux

Author: kenjis

README.md

@@ -35,6 +35,12 @@ codeigniter/
 $ composer create-project kenjis/codeigniter-composer-installer codeigniter
 ```
 
+If you want to install translations for system messages (requires shell).
+
+```
+$ bin/install-translations.sh
+```
+
 ### Run PHP built-in server
 
 ```

bin/install-translations.sh

@@ -13,7 +13,13 @@ version="$1"
 
 curl -L -o translations.zip "https://github.com/bcit-ci/codeigniter3-translations/archive/$version.zip"
 unzip translations.zip
-cp -rf "codeigniter3-translations-$version/language/" ../application/language/
+
+OS=`uname`
+if [ "$OS" = "Darwin" ]; then
+    cp -rf "codeigniter3-translations-$version/language/" ../application/language/
+else
+    cp -rf "codeigniter3-translations-$version/language/" -T ../application/language/
+fi
 
 rm translations.zip
 rm -rf "codeigniter3-translations-$version"