DOS PDOS BAND scripts. (they almost works ok. But need to check more--> gap shown in dos plot).

We have following five commands.
(maybe unified to be job_band, job_tdos).

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BAND
>job_band_nspin1 foobar (for nspin=1)
>job_band_nspin2 foobar (for nspin=2)

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For given BZ_DOSMAX and BZ_NPTS (use new ctrlgen2.py and read it),
DOS
>job_tdos_nspin1 foobar
>job_tdos_nspin2 foobar
Then we have dos.tot.foobar, which are plotted by gnuplot.

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PDOS
For given BZ_DOSMAX and BZ_NPTS (use new ctrlgen2.py and read it),
>job_pdos foobar
gives dos.isp*.site*.foobar
These are plotted by gnuplot.

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*_nspin1 is for nspin=1, *_nspin2 for nspin=2.
foobar is the extensiton of ctrl files such as si, nio, or something.