Bug 14318: iDreamBooks doesn't work when Koha is using https

Bug 14318: iDreamBooks doesn't work when Koha is using https

If a Koha server is configured to run over SSL, all iDreamBooks content
is blocked due to the fact that a secure page is requesting an insecure
endpoint. This is due to the fact that the urls for iDreamBooks use http
and not https. A simple fix would be to switch them to https since
browsers have to qualms about loading a secure data endpoint from an
insecure one.

Test Plan:
1) Enable iDreamBooks
2) Set up your OPAC to use https
3) Verify iDreamBooks content continues to work

Note: tested Chrome and IE, so that the IE change would be validated.
      Discovered isbn semi-colon issue that is beyond scope of this bug.

Signed-off-by: Mark Tompsett <mtompset@hotmail.com>

Signed-off-by: Katrin Fischer <katrin.fischer.83@web.de>
Signed-off-by: Tomas Cohen Arazi <tomascohen@theke.io>