Some change in spirit/class or boost.move has rippled through to generate a
huge number of test failures in the serialization library on the develop
branch.  OK that is what the develop branch is for.  But it would be much
better if the test script were enhanced to use the following (pseudo code)
procedure

for each library
    set branch to master

for each library x
    set branch to develop
    run tests on library x
    set branch back to master