ENH: improvements, modernization of matrix containers (#1220)

- add iterators, begin/end, empty() methods for STL behaviour.
  Use standard algorithms where possible
     * std::fill, std::copy
     * std::min_element, std::max_element

- access methods consistent with other OpenFOAM containers:
     * data(), cdata(), uniform()

- Use ListPolicy to impose output line breaks

- Can recover matrix storage for re-use elsewhere.
  For example, to populate values with 2D i-j addressing and later
  release it as flat linear storage.

- construct/assign moveable

- added minMax() function for Matrix

- additional inplace +=, -=, *=, /= operations

- add named methods at() and rowData() to Matrix.
  Allows a better distinction between linear and row-based addressing

- low-level matrix solve on List/UList instead of Field

src/OpenFOAM/matrices/RectangularMatrix/RectangularMatrix.H

@@ -77,27 +77,30 @@ public:
         inline RectangularMatrix(const MatrixBlock<MatrixType>&);
 
         //- Construct with given number of rows and columns
-        //  initializing all elements to zero
+        //- initializing all elements to zero
         inline RectangularMatrix(const label m, const label n, const zero);
 
         //- Construct with given number of rows and columns
-        //  and value for all elements.
-        inline RectangularMatrix(const label m, const label n, const Type&);
+        //- and value for all elements.
+        inline RectangularMatrix(const label m, const label n, const Type& val);
 
         //- Construct as copy of a square matrix
-        inline RectangularMatrix(const SquareMatrix<Type>&);
+        inline RectangularMatrix(const SquareMatrix<Type>& mat);
 
         //- Construct from Istream.
-        inline RectangularMatrix(Istream&);
+        inline RectangularMatrix(Istream& is);
 
         //- Clone
         inline autoPtr<RectangularMatrix<Type>> clone() const;
 
 
-    // Member operators
+    // Member Operators
 
         //- Assignment of all elements to zero
         void operator=(const zero);
+
+        //- Assignment of all elements to the given value
+        void operator=(const Type& val);
 };