JCDPS file format

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line 1: version_number (should be 3)
line 2: header
line 3: symmetry_code, K0, K0p
line 4: a, b, c, alpha, beta, gamma (this line is different depending on symmetry, see examples)
line 5: (blankline for future use)
line 6: column description (d  I/I0  h k l)
line 7: d-spacing, I/I0, h, k, l
.
.
.
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* symmetry code
1	cubic
2	hexagonal
3	tetragonal
4	orthorhombic
5	monoclinic
6	triclinic
