There are currently problems building with latest intel

Fix incorrect EXPANSION module in manual

trigger build

Try to make sasa appear under module

try to make sasa appear under module

Fortran typesafe

Modified the description of the sasa module

See #524

Allow detecting errors like this:

   48 |     call plumed_f_gcmd("setPositions"//char(0),positions((/1,2,3/),:))
      |                                                                      1
Error: There is no specific subroutine for the generic 'plumed_f_gcmd' at (1)

Makes the template more readable

Eliminated some not-anymore-needed arguments

These functions are called with `bind(C)` and do not need
the duplication of the definitions.

Thanks to this trick:
https://github.com/plumed/plumed2/pull/704#issuecomment-865896071

changelog

cc: @andrea-arsiccio

Module for the computation of the solvent accessible surface area of proteins