[GRASS5] Final additions to 5.4.0

[Paul Kelly]

Last Saturday I merged a few changes from the previous week in the 5.3 CVS 
HEAD into the 5.4 release branch. A few bugfixes and I added the new 
tcltkgrass modules that Michael put in, as I thought they couldn't do any 
harm.

There've been a lot of changes to the 5.3 CVS HEAD though this week, which 
really makes it quite confusing. Unless anybody makes a special case for 
including any of these, I will leave them out, and tidy up the INSTALL and 
NEWS.html and release 5.4.0 next week. If there were any simple bugfixes 
necessary for compilation on all platforms that are unlikely to have any 
side effects, they could go in. But there's a good few substantial-looking 
changes that will have to stay out.

I thought a good plan would be for the version of all files in the 
released version of 5.4.0 to be those that would be directly moved into 
the 5.7 CVS by Bernhard. Is there any reason not to do this?

Paul