Handling putting Sunday readings "pod zachalo"

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In certain instance, notably when September 1 falls on a Sunday or October 26 
(GM Demetrius), the Sunday reading is read "pod zachalo", as part of the 
reading for the feast. Thus, here:
http://www.ponomar.net/cgi-bin/menologion.cgi?month=10&day=26&year=2015
the order of readings should be:
Earthquake 
Sunday (pod zachalo)
Martyr

The software should be rewritten so that the readings hash is reordered in such 
instances. Perhaps a "pod zachalo" tag should also be introduced in the API.

Original issue reported on code.google.com by [email protected] on 4 Nov 2014 at 5:10