refactor using delegate (class TerminalCommandProcessor) instead of inheritance

[Arnaud-Nauwynck]

introduce class TerminalCommandProcessor to extract code specific to processing ansi escape commands (currently mixed into AnsiOutputStream, and using override...)
.. so change class inheritance by delegation...(Design Pattern best practices).
.. so also refactor to class WindowsTerminalCommandProcessor extends TerminalCommandProcessor instead of extending both WindowsAnsiOutputStream and WindowsAnsiPrintStream

instead of

   AnsiOutputStream               AnsiPrintStream        <=== lot of Copy&Paste
          /\                              /\
       extends                        extends
           |                              |
   WindowsAnsiOutputStream        WindowsAnsiPrintStream   <=== also lot of Copy&Paste

refactor as

   AnsiOutputStream                      AnsiPrintStream     <==== still lot of Copy&Paste
                   \                         /         ( ... cf other PR to fix this )
                   uses                   uses
                      \                    /
                      1 \/               \/ 1
                        TerminalCommandProcessor     <---  factory ---  TerminalType
                                     /\
                                      |
                          WindowsAnsiPrintStream

[hboutemy]

good idea but too complex code
rewrote it, keeping naming and package conventions, avoiding Writer, keeping compatibility with previous API