docs(sci): Modify comments to work with doxygen

minor

Modify comments in the global.f90 file to work with doxygen's automatic
documentation creator.

Comments #1
<chore>(sci): Update commenting format to work with doxygen.

minor

Updates commenting format to be compatable with doxygen software. Folders
with doxygen output now available in database. Also removes some unused
Fortran code from database. Comments made to mainn, cpagen, calcSig.f90,
ccrlu.f90, and clubk.f90. Code no longer available cmplxLin.f90,
cpaBisect.f90, and herakl.f90.

Comments #2
Merge branch 'testing' of https://github.com/akoufos/Tight-binding-CPA into testing

Local files were out of sync with the origin testing.