Bug 19735: Add support for max_ver

Bug 19735: Add support for max_ver

This patchset adds support for extracting 'max_ver' from the cpanfile so
we can use version ranges properly and report errors if we have modules
installed that do not fit within that version range.

Test plan:
1) Manually modify the module version of a required module in the cpanfile
   to have a max version greater than the version you have installed.
2) Run through the install proceedure and note the new warning that a
   module needs upgrade for the module in question.
3) The module should also be reported in the about page

Signed-off-by: Jonathan Druart <jonathan.druart@bugs.koha-community.org>
Signed-off-by: Martin Renvoize <martin.renvoize@ptfs-europe.com>