Argument Parsing

- Obsoleted Command::exectute  'commandLine' argument.  It is worse
  than unnecessary, it is an uncategorized raw argument string, which
  is only really useful for the 'execute' command, which itself now
  calls Arguments::combine to reconstruct the command line string.

src/commands/CmdCount.cpp

@@ -43,7 +43,7 @@ CmdCount::CmdCount ()
 }
 
 ////////////////////////////////////////////////////////////////////////////////
-int CmdCount::execute (const std::string&, std::string& output)
+int CmdCount::execute (std::string& output)
 {
   // Scan the pending tasks, applying any filter.
   std::vector <Task> tasks;