[Pig Wiki] Update of "PigStreamingFunctionalSpec" by OlgaN

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The following page has been changed by OlgaN:
http://wiki.apache.org/pig/PigStreamingFunctionalSpec

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  ===== 4.1.1 Logging =====
  
- stderr of streaming application needs to be captured and presented to the 
user in a easily digestable format. The user will be presented the output of 
each streaming task separately with the header that includes the following 
information:  task name, task result code, start time, end time.
+ stderr of streaming application needs to be captured and presented to the 
user in a easily digestable format. The user will be presented the output of 
each streaming task separately with the header that includes the following 
information:  task name, task result code, start time, end time, input size, 
and primary output size.
  
  ===== 4.1.2 Error Handling =====
  
@@ -276, +276 @@

  
  Several users need to have a way to compute a scalar using pig and use it in 
later computations.
  
- The want to be able to do something like this:
+ They want to be able to do something like this:
  
  {{{
  A = load 'data1';
  B = group A all;
- C = foreach B generate COUNT(B);
+ C = COUNT(B);
  D = load 'data2';
  E = foreach D generate $1/C;
  }}}