fixes bug 976755 - laglog endpoint produces way too much data
fixes bug 983194 - pyflakes 2014 spring cleanup
Merge pull request #1952 from peterbe/bug-983194-pyflakes-2014-spring-cleanup

fixes bug 983194 - pyflakes 2014 spring cleanup
fixes bug 908214 - replace self.assertRaises with assert_raises, r=AdrianGaudebert
Merge pull request #1937 from peterbe/bug-976755-laglog-endpoint-produces-way-too-much-data

fixes bug 976755 - laglog endpoint produces way too much data
fixes bug 974726 - implement correlations using postgres
Merge pull request #1908 from rhelmer/bug974726-correlations-using-postgres

fixes bug 974726 - implement correlations using postgres
fixes bug 983294 - BadStatusCodeError doesn't have an error message, r=rhelmer