Cif2cell

* Bugfixes in the CASTEP interface (thanks to Keith Refson).

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* Added reciprocal lattice vectors method to CrystalData (useful
for setting up a k-space mesh).
* Bugfixes.

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* Fixed problem with Python < 2.6

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* Translation of supercell possible.
* Possibility of adding vacuum added to the supercell
generator.
* New input format for RSPt program.

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* A couple of minor bugfixes.
* Improved error handling.
* Added possibility to specify which CIF grammar to use.

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This is the first official release. Program features:
* Generation of principal or primitive cell.
* Generation of supercells.
* Output for : ABINIT, Siesta, CPMD, CASTEP, Crystal09,
elk, EMTO, exciting, Fleur, ncol, RSPt, Siesta and VASP.