[Pig Wiki] Trivial Update of "HowToDocumentation" by CorinneC

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The following page has been changed by CorinneC:
http://wiki.apache.org/pig/HowToDocumentation

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  Forrest includes these files that you can modify for the Pig website docs or Pig user docs:
     * /src/docs/'''forrest.properties''' – add plugins and set other properties here
-    * /src/docs/src/documentation/'''skinconf.xml''' – add CSS style changes and set other switches here
+    * /src/docs/src/documentation/'''skinconf.xml''' – add CSS style changes, change logos, and set other switches here
     * /src/docs/src/documentation//content/xdocs/'''site.xml''' – add or remove *.xml docs files here; controls which documents appear in the menu
     * /src/docs/src/documentation//content/xdocs/'''tabs.xml''' – add or remove tabs here; controls which tabs appear on each page