OseenSolver::M_localMap is a MapEpetra and not a pointer

Tutorial 9_ETA_gradient_interpolation does the same things as the test
ETA_interpolate_gradient_2D, but in 3D
Fixed various comments in other ETA tests

Fixed documentation for ETCurrentFE::dPhi
Removed unused commented lines in
Integrate{Matrix,Vector,Value}Element.hpp

Note: if P1Bubble are selected, the code will use P2.

the selection of the proper version of HDF5 routines is now done via the
macro H5_USE_16_API, rather than with #define H5Dcreate_vers etc.

- missing UPDATE_NORMALS before using normals for natural BCs involving
  a BCVector (mode 1)

BCInterface should be after core, since it is an utility for many
modules.

Introducing IFDEF