- remove a bug to allow printing of vectors with differing scale lengths
- add option 'numdgt' to specify the width of the numbers printed
- add variable wr_singlescale
use 'set wr_singlescale' to print the scale vector only once
(vectors need to have equal scale lengths)
- add variable wr_vecnames
use 'set wr_vecnames' to print the vector names to the first row
Contrary to older versions gnuplot 5 uses "enhanced text mode" per default.
The strings which we pass to gnuplot don't have "latex" semantics,
thus consistently enforce "noenhanced text mode".
Add a function quote_gnuplot_string() to escape and quote strings
in such a way that they will arrive in gnuplot unmodified.
use this enum for some function arguments and struct members .
drop some include "variable.h" which are no longer needed ,
propably many more could be droped .
drop #define VT_* which have been used as workaround for the type mess .