Remove now obsolete sources/*.CM files; update README a bit

sources/LOADUP-APPS.CM

@@ -1 +0,0 @@
-"

sources/LOADUP-FULL.CM

@@ -1 +0,0 @@
-"

sources/LOADUP-INIT.LISP

@@ -1,19 +0,0 @@
-(* "make init files; this file is loaded as a 'greet' file by scripts/loadup-init.sh")
-
-(LOAD (CONCAT (UNIX-GETENV "MEDLEYDIR") "/sources/MEDLEYDIR.LCOM"))
-(CNDIR (UNIX-GETENV "LOADUP_WORKDIR"))
-(DRIBBLE "init.dribble")
-
-(UNADVISE)
-(ADVISE 'PAGEFULLFN '(RETURN))
-(ADVISE '(ERROR IN \DO-DEFINE-FILE-INFO) '(RETURN))
-(MOVD? 'NILL 'SETTEMPLATE)
-(DEFINEQ (RRE (LAMBDA (X Y) Y)))
-(MOVD? 'RRE 'READ-READER-ENVIRONMENT)
-
-(LOAD (MEDLEYDIR "sources" "MAKEINIT.LCOM"))
-(MAKEINITGREET)
-(DRIBBLE)
-(LOGOUT T)
-STOP
-

sources/LOADUP-LISP.CM

@@ -1 +0,0 @@
-"

sources/XREM.CM

@@ -1,6 +0,0 @@
-"
-(MOVD? (QUOTE NILL) (QUOTE PROMPTPRINT))
-(MOVD? (QUOTE NILL) (QUOTE CURSORP))
-(MOVD? (QUOTE NILL) (QUOTE CHANGEBACKGROUNDBORDER))
-(LOGOUT)
-"