Update ManiaScript.xml language definition
Update README.md
Revert "Update ManiaScript.xml language definition"

This reverts commit c82f6dafca23dee7d865dd5151759c061ab8cbdc.
Revert "Revert "Update ManiaScript.xml language definition""

This reverts commit 91a84a37217991a5bdb2d4d0685a1432a5dfc627.