Function std.process.system
			   Execute  in a command commandshell.
   Deprecated. Please use spawnShell or executeShell
         instead. This function will be removed in August 2015.
Prototype
deprecated int system( string command );
Returns
If  is null, returns nonzero if the command
   interpreter is found, and zero otherwise. If command is not
   null, returns -1 on error, or the exit status of commandcommand (which may
   in turn signal an error in command's execution).
Note
On Unix systems, the homonym C function (which is accessible
   to D programs as core.stdc.stdlib.system)
   returns a code in the same format as waitpid,
   meaning that C programs must use the WEXITSTATUS macro to
   extract the actual exit code from the  call. D's system automatically extracts the exit status.
system
Authors
Lars Tandle Kyllingstad, Steven Schveighoffer, Vladimir Panteleev