Write example of domain setup using the wrapper.
Improve example of domain setup.
Add algorithms from 'viennagrid.wrapper' to the Sphinx documentation.
Fix algorithm 'cell_refine'.

Since the third parameter of the function was a pointer to a C++ function, trying to apply the 'cell_refine' algorithm passing a Python function as the third parameter caused an 'ArgumentError' to be raised by Boost.Python.

To be able to use this algorithm, the type of the third parameter had to be changed to a Python object, since Python functions are also objects and must be handled in Boost.Python as such. This way, the Python object that represents a Python function can be called with any other Python objects as parameters, even in C++. That's how we call the 'predicate' function onto the cell object to be processed.
Document method 'get_facets' of cells with Doxygen.
Document method 'get_edges' of cells with Doxygen.
Wrap attribute 'edges' of cells to get a list of the edges that form a cell.
Fix algorithm 'refine'.

Since the third parameter of the function was a pointer to a C++ function, trying to apply the 'refine' algorithm passing a Python function as the third parameter caused an 'ArgumentError' to be raised by Boost.Python.

To be able to use this algorithm, the type of the third parameter had to be changed to a Python object, since Python functions are also objects and must be handled in Boost.Python as such. This way, the Python object that represents a Python function can be called with any other Python objects as parameters, even in C++. That's how we call the 'predicate' function onto the edge object to be processed.
Write example of algorithms using the wrapper.
Write an example of the use of the Netgen reader.
Create files for accessors.
Write type definitions for cell accessors.
Add accessors to CMakeLists.
Implement methods 'num_cells', 'make_cell' and 'get_cell' for linear domains.
Implement methods 'num_cells', 'make_cell' and 'get_cell' for triangular domains.
Implement methods 'num_cells', 'make_cell' and 'get_cell' for quadrilateral domains.
Implement methods 'num_cells', 'make_cell' and 'get_cell' for tetrahedral domains.
Wrap methods 'num_cells', 'make_cell' and 'get_cell' for domains.
Remove test for old readers and writers.
Fix error in 'test_cells.py' that caused tests to fail.