Init presets

Box can offer preset archives, which can be used by the user to quickly and easily initialise their project based on the box. Creating a preset is very easy. Make an empty directory and copy all the needed files into it. Then add a sample box.json. After that put all those files into a file called init.tar. Be aware that the files have to be in the top level of the tar. If they are in a directory, the preset will not function properly. After creating the file, just upload it like you would any other file.