eoVector is back (eoFixedLength and eoVariableLength are gone)

Also: introducing eoRndGenerators.h for eoRndGenerator derived classes:

  eoNormalGenerator
  eoUniformGenerator
  eoBooleanGenerator
  eoNegExpGenerator

Note the suffix that are added to aid in determining what these classes do

eo/src/utils/eoRNG.cpp

@@ -1,10 +1,9 @@
 #include <ctime>
 #include "eoRNG.h"
 
-/// The global object, should probably be initialized with an xor
-/// between time and process_id.
 namespace eo
 {
+/// The Global random number generator. 
 eoRng rng((uint32) time(0));
 }