helpers: add automatic logging of Flash messages shown to users Log all messages displayed through a flash to the user. Subsequent patches can change the log level for individual flash calls to make the log more useful.

[tox]
envlist = py{26,27}-{pytest,nose}

[testenv]
setenv =
    PYTHONHASHSEED = 0
deps =
    nose: nose
    pytest: pytest
commands =
    nose: nosetests {posargs}
    pytest: py.test {posargs}