additional methods in NSMutableString

[Manuel Guesdon]

Hi,

Would it be possible to add the following methods for NSMutableString in 
GNUstep additions ?
- (void) abbreviateWithTildeInPath;
- (void) appendingPathComponent: (NSString*)aString;
- (void) appendingPathExtension: (NSString*)aString;
- (void) deletingLastPathComponent;
- (void) deletingPathExtension;
- (void) expandingTildeInPath;
- (void) resolvingSymlinksInPath;
- (void) standardizingPath;

Without them, we add to use NSString stringByXXX and create many (uneeded in 
some cases) temporary string.
When searchng for a particular file in a tree, we build a lot of this temporary 
strings...

Manuel