Changed the directory structure for gp

now: eoParseTree <-- the eoParseTree class
     eoParseTreeDepthInit <-- the eoParseTree depth initializer (eoGpDepthInitializer)
     eoParseTreeOp <-- the operators (xover and mutation)

base documentation written for:
* eoParseTree
* eoGpDepthInitializer
* eoSubtreeXOver
* eoBranchMutation
* eoPointMutation
* eoExpansionMutation
* eoCollapseSubtreeMutation
* eoHoistMutation

I also created a group ParseTree which contains all classes related to eoParseTree

eoGpMutate.h has been removed (merged with eoParseTree operators into eoParseTreeOp

eo/app/gpsymreg/main.cc

@@ -23,7 +23,6 @@
 
 #include <iostream>
 #include <gp/eoParseTree.h>
-#include <gp/eoGpMutate.h>
 #include <eo>
 
 using namespace gp_parse_tree;
@@ -84,7 +83,9 @@ int main(int argc, char *argv[])
 
     
     	// define X-OVER
-        eoSubtreeXOver<FitnessType, Node>   xover(parameter.MaxSize);
+        
+	eoSubtreeXOver<FitnessType, Node>   xover(parameter.MaxSize);
+	
 	// define MUTATION
       eoBranchMutation<FitnessType, Node> mutation(initializer, parameter.MaxSize);
 //      eoExpansionMutation<FitnessType, Node> mutation(initializer, parameter.MaxSize);