Revert "- delete sample-robots.txt"

This reverts commit 089583c58cd208ace31dc1e33b7e288c58abcbfd.
Revert "- delete language files form install"

This reverts commit 12e2c204a153543752337df2b9c6f081da826084.
Revert "- delete language files from manager"

This reverts commit 68ef3ea09e0e4bb811682e169de217634e1d167a.
Revert "- delete language files from tinyMCE"

This reverts commit 507d98bb1a3796cdbe80d42cb4c149ea8b28bafe.