Merge pull request #1780 from ngokevin/iarcnag

add message to update ratings on version upload (bug 971058)
Turn zippy payments back on in dev (bug 970310)
add in propagation of exceptions (bug 974164)
Merge pull request #1776 from andymckay/974164

add in propagation of exceptions (bug 974164)
switch reviewers app history to use comm api (bug 920746)