The variables volfrac and massfrac which are meant to hold the volume
and mass weighted mean ionization fractions for writing to PhotonCounts2.dat
(unit 95) were wrongly defined as arrays running from 0 to 2. This
mistake was due to synchronization with the Helium version of the code
(where both the HeII and HeIII fractions are calculated and stored
in these arrays).

volfrac and massfrac are now scalars again.
changed old fashioned 1pe10.3 to es10.3 format.

Will do so for more format statements.
Changed all 1pe10.3 (old fashioned Fortran) to es10.3. This should
cause no change in the output being produced by the code