[fdo-trac] #187: Expression Engine: Add RegisterFunctions method

[FDO]

#187: Expression Engine: Add RegisterFunctions method
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   Reporter:  jacklee      |       Owner:  gregboone
       Type:  enhancement  |      Status:  new      
   Priority:  minor        |   Milestone:  3.3.0    
  Component:  FDO API      |     Version:  3.3.0    
   Severity:  3            |    Keywords:           
External_id:               |  
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 Add the RegisterFunctions method to the Expression Engine.
 Once registered, the function is recognized by any provider.

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Ticket URL: <http://trac.osgeo.org/fdo/ticket/187>
FDO <http://fdo.osgeo.org/>
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