Matrix product refactoring (rhs products only).

Added strong inlines required for MSVC for proper inlining.
Added specializations for DiagonalMatrix products to RotationBase.
Added left- and righ-hand-side products with DiagonalMatrix to Transform.
RHS Transform products now return Matrix objects only.
Split the geo_transformations unit test. Some tests were not made for projectivities.
Removed unused variables from main.h that caused warnings.

Eigen/src/Core/VectorwiseOp.h

@@ -440,7 +440,7 @@ template<typename ExpressionType, int Direction> class VectorwiseOp
     }
 
     /** Returns the expression of the sum of the vector \a other to each subvector of \c *this */
-    template<typename OtherDerived>
+    template<typename OtherDerived> EIGEN_STRONG_INLINE 
     CwiseBinaryOp<ei_scalar_sum_op<Scalar>,
                   ExpressionType,
                   typename ExtendedType<OtherDerived>::Type>

Eigen/src/Core/products/CoeffBasedProduct.h

@@ -199,7 +199,7 @@ class CoeffBasedProduct
     }
 
     // Implicit conversion to the nested type (trigger the evaluation of the product)
-    operator const PlainObject& () const
+    EIGEN_STRONG_INLINE operator const PlainObject& () const
     {
       m_result.lazyAssign(*this);
       return m_result;

Eigen/src/Core/util/Macros.h

@@ -362,7 +362,7 @@
 
 #define EIGEN_MAKE_CWISE_BINARY_OP(METHOD,FUNCTOR) \
   template<typename OtherDerived> \
-  inline const CwiseBinaryOp<FUNCTOR<Scalar>, Derived, OtherDerived> \
+  EIGEN_STRONG_INLINE const CwiseBinaryOp<FUNCTOR<Scalar>, Derived, OtherDerived> \
   METHOD(const EIGEN_CURRENT_STORAGE_BASE_CLASS<OtherDerived> &other) const \
   { \
     return CwiseBinaryOp<FUNCTOR<Scalar>, Derived, OtherDerived>(derived(), other.derived()); \