LP1902937: KCLS Quipu integration bits

LP1902937: KCLS Quipu integration bits

Notes:

1. See constants along the top of Ecard.pm which will need changing.
2. Ecard.pm add_stat_cats() is very kcls-specific
3. The vendor login uses a new password type 'ecard_vendor' which does
   not have the intermediate md5 hashing.
4. Ecard.pm and templates have header/footer stuff that's specific to
   bibliocommons and should be removed.

Signed-off-by: Bill Erickson <berickxx@gmail.com>
Signed-off-by: Chris Sharp <csharp@georgialibraries.org>
Signed-off-by: Jason Stephenson <jason@sigio.com>