README: more fixes
|Reported by:||SF/clemty||Owned by:||SF/mthreepwood|
removes the parts telling the user that data files must be either upper- or lowercase - afaik this is not the case any more
also some rewording and one more tool filename enclosed in '
didn't include the removal of the upper/lowercase sections becauses I wasn't sure removing them is the correct way to go
Ticket imported from: #1779606. Ticket imported from: patches/825.