DOS PDOS BAND scripts. 

We have following commands.

For converged plot on DOS and PDOS, we need to use large NKABC. Even more than
self-consistent calculations.
For those plot, tokens BZ_DOSMAX (maximum to calculate dos plot relative to the fermi
energy or top of valence) and BZ_NPTS (number of bins of DOS) are used.
See ctrl files generated by new ctrlgen2.py.


In the followings, foobar is the extensiton of ctrl files such as si, nio, or something.
------------------
BAND
>job_band_nspin1 foobar (for nspin=1)
>job_band_nspin2 foobar (for nspin=2)

------------------
DOS
>job_tdos foobar
Then we have dos.tot.foobar, which are plotted by gnuplot.

------------------
PDOS
>job_pdos foobar
gives dos.isp*.site*.foobar. These are plotted by gnuplot.

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CMDsample/ is added. See CMDsample/README for calculations. 
SAVDOS=T was added to ctrlgen2.py