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added tilde expansion to primitives
installation now allows parallel versions (like gcc).
The version string is now in only one place

    1: You need gcc version 2.0 or later to compile gforth.
    2: 
    3: First, type
    4: 
    5: ./configure
    6: 
    7: configure has the following useful parameters:
    8:   --prefix=PREFIX         install architecture-independent files in PREFIX
    9:                           [default: /usr/local]
   10:   --exec-prefix=PREFIX    install architecture-dependent files in PREFIX
   11:                           [default: same as prefix]
   12:   --enable-force-reg      Use explicit register declarations if they appear in
   13:                           the machine.h file. This can cause a good speedup,
   14:                           but also incorrect code with some gcc versions on
   15:                           some processors (default disabled).
   16:   --enable-direct-threaded      Force direct threading. This may not work on
   17:                                 some machines and may cause slowdown on others.
   18:                                 (default processor-dependent)
   19:   --enable-indirect-threaded    Force indirect threading. This can cause a
   20:                                 slowdown on some machines.
   21:                                 (default processor-dependent)
   22:   --with-debug     specifies option -g to compile with debug info (default)
   23:    --without-debug  omits the -g switch and creates smaller images on
   24:                     machines where strip has problems with gcc style
   25:                     debugging informations.
   26:   --help: tells you about other parameters.
   27: 
   28: If you don't like the defaults for the installation directories, you
   29: should override them already during configure.  E.g., if you want to
   30: install in the /gnu hierarchy instead of in the default /usr/local
   31: hirarchy, say
   32: 
   33: ./configure --prefix=/gnu
   34: 
   35: After, configuration, type
   36: 
   37: make
   38: 
   39: If your make has trouble with the Makefile, "make gforth" might work.
   40: 
   41: If your installed gcc isn't called "gcc" (e.g., called "gcc-2.6.1"), type
   42: 
   43: make GCC=<whatever you call your gcc>
   44: 
   45: instead.
   46: 
   47: Now you can check whether your shiny new Forth system works. Say
   48: 
   49: make test
   50: 
   51: To make the documentation, type
   52: 
   53: make -k gforth.info gforth.ps html
   54: 
   55: If everything is allright, you may want to install gforth. Type
   56: 
   57: make install
   58: 
   59: You have to make an entry in the info directory file manually. Also,
   60: you have to install gforth.ps and html yourself.