Created read method on MString to read from sockets.

MString.h

@@ -213,6 +213,12 @@ namespace coreutils {
       ///
       
       MString &write(ZString &value);
+
+      ///
+      /// Read data from a socket and store in MString.
+      ///
+
+      MString &read(int fd);
       
       int offset();