History manager

• addhistory add lines to current history.
• browsehistory Open the Scilab history browser
• displayhistory displays current scilab history
• gethistory returns current scilab history in a string matrix
• gethistoryfile get filename used for scilab’s history
• historymanager enable or disable history manager
• historysize get number of lines in history
• loadhistory load a history file
• removelinehistory remove the Nth line in history.
• resethistory Deletes all entries in the scilab history.
• saveafterncommands Save the history file after n statements are added to the file.
• saveconsecutivecommands Save consecutive duplicate commands.
• savehistory save the current history in a file
• sethistoryfile set filename for scilab history