Changes in fe_base.C for -Wshadow.

Issue #24.
Changes in fe_boundary.C for -Wshadow.

Issue #24.
Changes in fe_xyz_map.C for -Wshadow.

Issue #24.
Changes in fe_xyz_shape_1D.C for -Wshadow.

Issue #24.
Changes in fe_xyz_shape_2D.C for -Wshadow.

Issue #24.
Changes in fe_xyz_shape_3D.C for -Wshadow.

Issue #24.
Changes in cell_hex.C for -Wshadow.

Issue #24.
Changes in edge.C for -Wshadow.

Issue #24.
Changes in elem.C for -Wshadow.

Issue #24.
Changes in face_quad.C for -Wshadow.

Issue #24.
Changes in node.C for -Wshadow.

Issue #24.
Changes in elem_refinement.C for -Wshadow.

Issue #24.
Changes in sphere.C for -Wshadow.

Issue #24.
Changes in abaqus_io.C for -Wshadow.

Issue #24.
Changes in diva_io.C for -Wshadow.

Issue #24.
Changes in boundary_info.C for -Wshadow.

Issue #24.
Changes in ensight_io.C for -Wshadow.

Issue #24.
Changes in fro_io.C for -Wshadow.

Issue #24.
 Changes in exodusII_io_helper.C for -Wshadow.

Issue #24.