DCore post tools

[yomichi]

Restructured post tools:

• dcore_post is divided to dcore_anacont and dcore_spectrum
  • dcore_anacont performs the analytic continuation of the self-energy
    • dcore_anacont_pade and dcore_anacont_spm are merged to this
    • Users can perform AC using their program (see )
  • dcore_spectrum calculates the spectral function A(k,w) and the density of state D(w)
• Sections of the input parameters for the post tools are changed
  • [tool] is moved to [post]
  • dcore_anacont reads [post.anacont]
  • dcore_spectrum reads [post.spectrum]