Update wording in README.
Update wording in README.

altmind/rivets,MishaMykhalyuk/rivets,benderTheCrime/tiny-rivets,QAPInt/rivets,mikeric/rivets,GerHobbelt/rivets,mikeric/rivets,QAPInt/rivets,MishaMykhalyuk/rivets,zongkelong/rivets,nopnop/rivets,altmind/rivets,re-clone/rivets,nopnop/rivets,MishaMykhalyuk/rivets,jccazeaux/rivets,nopnop/rivets,zongkelong/rivets,re-clone/rivets,GerHobbelt/rivets,mikeric/rivets,GerHobbelt/rivets,re-clone/rivets,zongkelong/rivets,altmind/rivets,QAPInt/rivets,jccazeaux/rivets,jccazeaux/rivets