Tests

Update CHANGELOG and bump version to 5.3.8 #418

Job	Run time
lint	25s
test (2.1, gems/rails3.gemfile)	20s
test (2.2)	30s
test (2.3)	28s
test (2.4)	35s
test (2.5)	35s
test (2.6)	27s
test (2.6, gems/typhoeus.gemfile, typhoeus)	33s
test (2.6, gems/octoshark.gemfile)	33s
test (2.6, gems/rails3.gemfile, 1.17.3)	33s
test (2.7)	24s
test (2.7, true)	27s
test (3.0)	40s
test (3.0, true)	18s
test (3.0, gems/instruments.gemfile, instruments)	16s
test (3.0, gems/instruments.gemfile, true, instruments)	16s
test (3.0, gems/sidekiq.gemfile, sidekiq_install)	13s
test (3.1)	18s
test (3.2)	23s
	8m 14s

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