Added classes to hendle bounds:

- eoGeneralRealBound  that can be initialized using a string (and hence can be
easily read as a parameter)
- eoIntBound and all other integer-equivalent of the classes in eoRealBound.h
Note that there is no equivalent to eoRealVectorBounds for vector of integers

In file eo, I have added the 2 includes of eoRealBounds.h and eoIntBounds.h
The first one was already there by chance, through eoUniformInit.h

eo/src/eo

@@ -127,6 +127,8 @@
 
 // Utils
 #include <utils/checkpointing>
+#include <utils/eoRealVectorBounds.h> // includes eoRealBounds.h
+#include <utils/eoIntBounds.h>        // no eoIntVectorBounds
 
 // aliens
 #include <other/external_eo>