--list command add trailing slash for directories

To enable easier parsing of '--list' folders should be listed with a trailing forward slash i.e.
Library/
Library/Caches/
Library/Caches/uk.co.myapp.myapp/
Library/Caches/uk.co.myapp.myapp/com.apple.opengl/
/Library/Caches/uk.co.myapp.myapp/com.apple.opengl/compileCache.data
/Library/Caches/uk.co.myapp.myapp/com.apple.opengl/compileCache.maps
/Library/Caches/uk.co.myapp.myapp/com.apple.opengl/linkCache.data
/Library/Caches/uk.co.myapp.myapp/com.apple.opengl/linkCache.maps
/Library/Caches/uk.co.myapp.myapp/com.apple.opengl/shaders.data
/Library/Caches/uk.co.myapp.myapp/com.apple.opengl/shaders.maps

I've added this into my fork of the project. However it's not the tidiest of changes:
https://github.com/ATS-RyanPowell/ios-deploy/commit/805188d62e3bbbadadbb2b34ae7ddedfb13b98f2