vertextrap.py: python script to extrapolate vertically in empty levels conserving the slope of the profiles

New directory with tools to prepare restarts from any reanalysis by interpolating/extrapolating/filling empty seas with a climatology

Changed CFU_DTF so that removing the forecast GMT signature in the forecast field is removed by using one regression model only, not for each member.

Changed CFU_MODE making sure NAs are produced if NAs are projected, not 0s.

common_diagnostics.txt removed. Now it is part of s2dverification project. See: http://ic3.cat/wikicfu/index.php/Tools/s2dverification

Now it is using the land-sea mask of any forecast system.

Now the selection of forecast system via fcsys works.

In CFU_PB quantile computation type set to 8. Before type was set to 7.

Now lat and lon objects should be correct.