Replaced QPeig_read with iuqpeig in io_epw.f90, elphon_shuffle_wrap.f90, pw2wan2epw.f90

Updated alignments and format  in epw.f90, epw_readin.f90, loadkmesh.f90, loadumat.f90,  kfold.f90

allocate_epwq.f90
-----------------------------------------
1) - Updated based on PHonon/PH/allocate_phq.f90

2) - dpqq and dpqq_so should be allocated if [okvan .and. (epsil .or. zue .or. l_head)]

2) - Removed int3 and int3_nc allocation from allocate_epwq (they are only used for US)
   - It should be allocated in some place similar to PHonon/PH/phqscf.f90 or PHonon/PH/elphon.f90?

3) - Moved allocation of nbnd_occ(nks) to epw_setup.f90 as in PHonon/PH/phq_setup.f90

4) - Moved allocation of transp_temp(nstemp) to epw_setup.f90
=========================================

epw_setup.f90
-----------------------------------------
1) - Updated based on PHonon/PH/phq_setup.f90

2) - Should we remove the lines for lgamma_gamma, alpha_mix, flmixdpot?
   - I commented out these lines for now and the result seams unchanged.

3) - I think we can also remove the lines where npertx is defined.
=========================================

epw_summary.f90
-----------------------------------------
1) - Updated based on PHonon/PH/phq_summary.f90

2) - Updated alignment
=========================================

openfilepw.f90
-----------------------------------------
1) - Updated based on PHonon/PH/openfilq.f90

2) - Should we remove the lines where dvscf file used to be read?
   - These lines are commented out.
==========================================

epw_init.f90
------------------------------------------
1) - Updated based PHonon/PH/phq_init.f90

2) - Removed calls to struc_fact, init_vloc, init_us_1 and gk_sort.
   - These subroutines are already called in epw_readin.f90
     through the call to read_file.

     CALL read_file (PW/src/read_file_new.f90)
       -> CALL read_xml_file (PW/src/read_file_new.f90)
            -> CALL struc_fact (PW/src/struc_fact.f90)
            -> CALL init_vloc (PW/src/init_vloc.f90)
==========================================

dvanqq2.f90
------------------------------------------
1) - Updated based on PHonon/PH/dvanqq.f90 and added documentation
==========================================

elphon_shuffle_wrap
------------------------------------------
1) - Updated call to createkmap_pw2
   - It seams that xq0 doesn't need to be given in
     createkmap_pw2(xk_all, nkstot, xq0) since

     xq0(:) = zero
     CALL createkmap_pw2(xk_all, nkstot, xq0)

     and createkmap_pw2 is only called here
==========================================

createkmap.f90
------------------------------------------
1) - Updated createkmap_pw2 based on ggen subroutine from Modules/recvec_subs.f90
   - Removed kmap writing in createkmap_pw2 since this is in fact written in createkmap

2) - Added documentation

3) - Removed the check on xk_cryst since this is already done on xk and the two arrays are the same.

refold.f90
------------------------------------------
1) - Added documentation

2) - This subroutine could be moved at the end of createkmap.f90 file
     since it is only called once in createkmap_pw2
==========================================

Update made by Roxana Margine.