[Pig Wiki] Update of "Penny" by daijy

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The "Penny" page has been changed by daijy:
http://wiki.apache.org/pig/Penny?action=diff&rev1=1&rev2=2

- ---+ Penny
+ This page has been moved to [[https://cwiki.apache.org/confluence/display/PIG/Penny|Confluence]]
  
- Penny is a framework for creating custom Pig monitoring and debugging tools. It comes with a library of a dozen or so tools, for example:
-    * crash investigation -- why did my pig script crash?
-    * record tracing -- trace a particular record through the steps of a pig script, and show how it gets transformed
-    * integrity alerts -- send an alert if a record passing between steps i and j fails to satisfy a particular predicate
-    * overhead profiling -- which steps in the pig script dominate the running time?
- But the real power of Penny is in creating your own, custom, monitoring and debugging tools using Penny's simple API. It's easy. Try it!
- 
- ---++ Documentation
- 
-    * Check out our library of tools that you can use out of the box: PennyToolLibrary
-    * If you want to create your own tool using Penny (or if you want to understand how Penny works), read this: PennyCreateYourOwnTool
-