[telemac2d][telemac3d] HAMTIDE model for tidal boundary conditions

A new harmonic constants database is available for TELEMAC-2D and TELEMAC-3D to compute tidal boundary conditions or initial conditions: HAMTIDE global model from Hamburg University. https://www.cen.uni-hamburg.de/en/icdc/data/ocean/hamtide.html Reference: Taguchi, E., Stammer, D., and Zahel, W. (2014), Inferring deep ocean tidal energy dissipation from the global high-resolution data-assimilative HAMTIDE model, J. Geophys. Res. Oceans, 119, 4573– 4592, https://doi.org/10.1002/2013JC009766 Distributed in netCDF format by the Integrated Climate Data Center (ICDC), CEN, University of Hamburg, Hamburg, Germany.

First version of sources coming for David KELLY@JBA It is strongly based on TPXO module.

As HAMTIDE provides velocity components rather than transports (water depth times velocity components), no need to divide transports by water depth to compute velocity to prescribe at tidal boundary conditions or for initial conditions. A new keyword VELOCITIES IN BINARY DATABASE 2 FOR TIDE is created to distinguish OSU tidal solutions and HAMTIDE. This is the flag used in the TPXO module to divide by water depth or not.

Expected input format is the same as for OSU tidal solutions (e.g. TPXO): binary etc. Binary files are to be stored somewhere accessible to users.