Missing reactions related with grain added back

If a reaction involves grain, and the reaction breaks the molecule apart, the
isotopized version of this reaction will be missing in the previous version.

Five reactions were missing, and the first one is an important one:

H2Z(gr)      PHOTON       ZH           H                                        0.00E+00  1.21E-03  0.00E+00 -23

HCOZCH3      GRAIN        HCZOCH3(gr)  GRAIN                                    1.57E-10  6.00E+01  1.00E+00  20

HCOZCH3(gr)  TEMP         HCZOCH3                                               3.26E+03  6.00E+01  1.50E+15  21

HCOZCH3(gr)  C-RAY        HCZOCH3                                               3.26E+03  6.00E+01  1.50E+15  22

HCOZCH3(gr)  PHOTON       HCZOCH3                                               1.57E-10  1.00E-03  0.00E+00 -23