Update README.md
testFormattingZeroSecondsShort
testFormattingTwoSecondsShort
testFormattingShort
testCanOutputShortenedAssertionString
testWillUseShorterAssertionStringIfRequired
testWillRemoveCarriageReturns
Fix unit tests
Fix blank remaining seconds
Merge pull request #238 from elliotchance/1.5.2/238-cli-not-printing-some-lines

CLI not printing some lines
Merge pull request #239 from elliotchance/1.5.2/239-bug-when-assertion-string-is-too-long

Bug when assertion string gets too long
Merge pull request #240 from elliotchance/release/1.5.2

Release/1.5.2
Merge branch 'master' of https://github.com/elliotchance/concise into release/1.6