nagios-check-0.2.1: CHANGELOG.md

# Changelog

## v0.2.1

 - Support for GHC 7.4 (Justin S. Leitgeib, @jsl).
 - Fix bug in perfdata ordering (correct order is warn, crit, min, max;
   not min, max, warn, crit).

## v0.2.0

 - add addBarePerfdatum convenience function