[Thrift Wiki] Update of "ThriftTypes" by JakeFarrell

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The "ThriftTypes" page has been changed by JakeFarrell.
http://wiki.apache.org/thrift/ThriftTypes?action=diff&rev1=11&rev2=12

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  There are three container types:
  
   * '''{{{list<}}}''type''{{{>}}}''': An ordered list of elements. Translates to an STL {{{vector}}}, Java {{{ArrayList}}}, native arrays in scripting languages, etc.
-  * '''{{{set<}}}''type''{{{>}}}''': An unordered set of unique elements. Translates to an STL {{{set}}}, Java {{{HashSet}}}, {{{set}}} in Python, etc. This type is not supported in PHP! Use lists instead.
+  * '''{{{set<}}}''type''{{{>}}}''': An unordered set of unique elements. Translates to an STL {{{set}}}, Java {{{HashSet}}}, {{{set}}} in Python, etc. Note: PHP does not support sets, so it is treated similar to a List
   * '''{{{map<}}}''type1''{{{,}}}''type2''{{{>}}}''': A map of strictly unique keys to values. Translates to an STL {{{map}}}, Java {{{HashMap}}}, PHP associative array, Python/Ruby dictionary, etc.
  
  While defaults are provided, the type mappings are not explicitly fixed. Custom code generator directives have been added to allow substitution of custom types in various destination languages.