Remove trailing whitespace.

Also, the script is a one-liner, stolen from [1]:

ack --print0 -l '[ \t]+$' | xargs -0 -n1 perl -pi -e 's/[ \t]+$//'

[1]
https://stackoverflow.com/questions/149057/how-to-remove-trailing-whitespace-of-all-files-recursively

WINGs/README

@@ -3,8 +3,8 @@
 
                                    by
 
-                          Alfredo Kengi Kojima 
-                  
+                          Alfredo Kengi Kojima
+
                           kojima@windowmaker.info
 
 
@@ -16,12 +16,12 @@ also has other functions that are usefull for applications, like a
 User Defaults alike configuration manager and a notification system.
 
    The library is limited and its design is a little sloppy,
-so it's not intended to build large or complex applications, like 
+so it's not intended to build large or complex applications, like
 anything more complex than a CDPlayer. GNUstep should be used for such
 applications.
 
    Since WINGs is written in C and is sort of low-level it is small
-and faster than say, Motif or even Athena. Knowing Xlib will help you to 
+and faster than say, Motif or even Athena. Knowing Xlib will help you to
 workaround some of its limitations, although you'll probably be able to
 write something like a trivial tic-tac-toe game without knowing much Xlib.
 
@@ -31,7 +31,7 @@ support Window Maker. All other uses of it are just an added bonus.
 
    It will help you to understand the API if you read the ApplicationKit
 reference manual, distributed as a PDF by Apple. The function names,
-structs and most of the intrinsics are very close to OpenStep classes. 
+structs and most of the intrinsics are very close to OpenStep classes.
 
 
 Internationalization:
@@ -66,7 +66,7 @@ Widgets provided by WINGs:
 - input box
 - file panel
 - color panel
-- alert panel 
+- alert panel
 - font panel
 
 If you think you can code the following, please do. They are needed by