Fix path in post-install/update script
Add debug stuff (do not push me!)
Add teleport-tpl-dir option (define in extra section of composer.json)
Add teleport-tpl-update option and default to true

Adds option for symlinks in the tpl/ directory to be updated by the post-update-cmd (and post-install-cmd if relevant)
Default tpl update to false since they are symlinks (duh)
Try relative path for symlinks (duh)
And now to make it work on symlinks from various depths