feat(eo): wrap ops on float vecs into ops on int vecs

Adds wrapper classes to make any MonOp or QuadOp that operates on eoReal embbedable in any operator needing an eoInt.

eo/test/t-eoRealToIntMonOp.cpp

@@ -0,0 +1,28 @@
+#include <iostream>
+
+#include <eo>
+#include <es.h>
+
+using namespace std;
+
+int main(int, char**)
+{
+    eoIntInterval bounds(1,5);
+
+    using Chrom = eoInt<double>;
+    using MutWrapper = eoRealToIntMonOp<Chrom>;
+
+    eoDetUniformMutation< typename MutWrapper::EOTreal > mutreal(/*range*/6, /*nb*/5);
+
+    MutWrapper mutint(mutreal, bounds);
+
+    Chrom sol({1,2,3,4,5});
+
+    bool changed = mutint(sol);
+    assert(changed);
+
+    for(auto& x : sol) {
+        assert(bounds.isInBounds(x));
+    }
+}
+