Bug 12844: New module to manage prices into Koha

Bug 12844: New module to manage prices into Koha

This patch introduces a new module to manage prices into Koha and
especially the acquisition module.

How to use is:
1/ You can use it in a perl script/module:
  my $price = Koha::Number::Price->new(3);
  $price->format; # Will display 3.00 (or 3,00 depending on the CurrencyFormat syspref).
  $price->format({with_symbol => 1}); # Will display €3.00 (or [$]3,00 depending on the CurrencyFormat syspref).

2/ But this module is usefull to display the price from a template file.
  [% my_price | Price %]

Signed-off-by: Paola Rossi <paola.rossi@cineca.it>
Signed-off-by: Katrin Fischer <katrin.fischer.83@web.de>
Signed-off-by: Tomas Cohen Arazi <tomascohen@gmail.com>