Stable branch of base library renamed ... please test

[Richard Frith-Macdonald]

I have renamed the stable branch of the base library from svn:// 
svn.gna.org/svn/gnustep/libs/base/branches/base-1_13_0 to svn:// 
svn.gna.org/svn/gnustep/libs/base/branches/stable so that it's clear  
which is the stable branch (and easy to automate processes involving  
it).

If you already have base-1_13_0 checked out, you can easily convert  
using 'svn switch svn://svn.gna.org/svn/gnustep/libs/base/branches/ 
stable .' or svn switch svn+ssh://svn.gna.org/svn/gnustep/libs/base/ 
branches/stable .' in the checked out directory.

The branch currently contains a few bugfixes backported as a result  
of recent testing ... a minor MacOS-X compatibility fix for  
initiualising an NSURL instance, a locale fix when initialising an  
NSDecimal number, and a fix for a crash in NSBundle when a program is  
linked with a lot of Frameworks.

Please try it out (using current/stable versions of other GNUstep  
libraries, not unstable/trunk) and let me know of any problems.  This  
should work perfectly with application binaries which were built  
against the current release of GNUstep (unless said application  
happens to contain a bug such that it depends on a buggy behavior of  
course).