lev_comp,dgn_comp vs CRLF style input

Allow the special level and dungeon compilers to handle input
files which have CR+LF delimited lines.  Apparently Cygwin doesn't
convert MSDOS style line ends into newlines the way stdio should
do for text I/O.  The resulting unexpected CR characters result in
syntax errors.

     And explicitly using '\n' on both the lex and yacc sides of
MAP processing allows removal of the old NEWLINE hack for Mac MPW.
It won't matter what numeric value that character escape sequence
has internally.

doc/fixes34.1

@@ -24,6 +24,8 @@ don't drop corpse when a monster kills another monster on an inaccessible
 half-physical-damage from gas spore explosion should only affect you
 Sunsword didn't stop glowing when hero killed a monster wielding it
 mimics caught in explosions with messages printed about them are discovered
+let lev_comp and dgn_comp accept optional carriage return character prior to
+	the terminating newline in special level and dungeon description files
 
 
 Platform- and/or Interface-Specific Fixes