Compression Library to decompress the images.

* Fixcprt.py: added [-y file] option, do only files younger than file.
* modsupport.[ch]: added vmkvalue().
* intobject.c: use mkvalue().
* stringobject.c: added "formatstring"; renamed string* to string_*;
  ceval.c: call formatstring for string % value.
* longobject.c: close memory leak in divmod.
* parsetok.c: set result node to NULL when returning an error.

	 - call v.SetParam() after v.BindGLWindow()
	 - turn of dithering in mono/grey mode
	 - use prefposition to place the top left corner at (150, 150)
	   (so that the video remains visible during recording)
	 - default width is 256
Vcopy.py: correct typos; more verbose output.
OldVcopy.py: new name for Jack's old grabbing Vcopy.py.
Vstat.py: print values of all video parameters.

Don't force packfactor to 1 in header when writing rgb data.
Small bugfixes in Vcopy.

- Renamed old Vcopy.py to OldVcopy.py, some cosmetic changes to it (is
  it still needed?)
- Added new Vcopy.py which does everything that Vtime.py does but also
  format conversions, image scaling, and packfactors.
- VFile: make packfactor always a tuple; introduce set and get methods
  for pf, format, and calculate some derived values.
- Added new module GET.py to std library, use it instead of defining
  DM* in VFile.
- Get rid of C programs (new Python programs can do all that they do
  and they probably don't understand the current file format anyway).

get rid of testpackfactor(): not longer necessary

* Added libwww entry to Makefile.
* Documented new array module.
* Documented extensions to regex (last, substring, translation table).

                 screen
Dsend - Main program analogous to Vsend to send data from display

  accordingly: SetMin, SetMax, SetDefault are no longer methods of the
  compressor/decompressor but are functions of the cl module and they
  take a first argument which is a compression scheme

Vedit.py, VeditForm.fd: added scroll bar, Trunc, layout rearrangement.
Viewer.py: added random access, qinfo() function.

  way); more efficiently check whether parameters are float; removed
  one argument from DecompressImage method; use clGetParam instead of
  clGetParams where it makes sense; convert int parameters in
  SetParams, SetParam, SetMin, SetMax, and SetDefault to float when
  needed; added QuerySchemeFromHandle method
* Makefile: interchanged cstubs and cgen.py so that $> in rule gets
  them in the right order

Vrecb.py: use the new interfaces to imageop (fix -M, -m, -g options).