aps_package: book references fix

* Adds publisher location information.

* Adds editors.

* Adds volume and page information.

Signed-off-by: Georgios Papoutsakis<georgios.papoutsakis@cern.ch>
Merge pull request #31 from GiorgosPa/aps

aps_package: book references fix
Updates several modules to use ftp_utils

* springer_package

* oup_package

* scoap3utils

* springer_package

* contrast_out

* elsevier_package

* ftp_utils: adds delete, get_filesize and
  check_pkgs_integrity functions.

Signed-off by: Georgios Papoutsakis<georgios.papoutsakis@cern.ch>