Do not throw exception on I/O error. Reason: Not throwing an exception is the expection of c++ streams.

git-svn-id: https://svn.microneil.com/svn/CodeDweller/branches/adeniz_1@69 d34b734f-a00e-4b39-a726-e4eeb87269ab

child.cpp

       throw std::invalid_argument("A child executable must be specified.");
     }
 
-    reader.exceptions(std::istream::failbit | std::istream::badbit);
-    writer.exceptions(std::ostream::failbit | std::ostream::badbit);
     childStarted = false;
     childExited = false;
     exitCodeObtainedFlag = false;