Fixed Nestorian & Messalian CTD on clicking Religion tab (vanilla map)

- Nestorian/Messalian had 7 holy sites on our 'vanilla' map rather than 5, causing a CTD
  - Removed Alexandria and Samos; left Constantinople, Jerusalem, Antioch, Baghdad, Rayyed
- Prepared for 3.5.16 as final version to be released for the CKII 2.1.6 branch on 2014-10-07