Unified Pseudopotential File (UPF) Specifications - see:
http://www.quantum-espresso.org/wiki/index.php/Unified_pseudopotential_format

Available converters to UPF from:
  CASINO tabulated format
  CPMD (TYPE=NORMCONSERVING NUMERIC only, single radial grid)
  Fritz-Haber numerical format, either ".cpi" (fhi88pp) or ".fhi" (abinit)
  David Vanderbilt's code format (formatted or binary)
  Old Norm-Conserving PWSCF format (deprecated)
  Old "RRKJ3" PWSCF format (deprecated)
  Old Norm-Conserving CP90  format (deprecated)