* rework Map, allow vectorization

* rework PacketMath and DummyPacketMath, make these actual template
specializations instead of just overriding by non-template inline
functions
* introduce ei_ploadt and ei_pstoret, make use of them in Map and Matrix
* remove Matrix::map() methods, use Map constructors instead.

Eigen/src/Core/util/StaticAssert.h

@@ -58,7 +58,8 @@
         you_tried_calling_a_vector_method_on_a_matrix,
         you_mixed_vectors_of_different_sizes,
         you_mixed_matrices_of_different_sizes,
-        you_did_a_programming_error
+        you_did_a_programming_error,
+        unaligned_load_and_store_operations_unimplemented_on_AltiVec
       };
     };