Changelog for StockholmAlignment-1.0.3

-*-change-log-*- 1.0.3 Florian Eggenhofer <egg@informatik.uni-freiburg.de> 24. April 2017 * Relaxed version bounds on diagrams library 1.0.2 Florian Eggenhofer <egg@informatik.uni-freiburg.de> 12. April 2017 * Included additional tag characters 1.0.1 Florian Eggenhofer <egg@informatik.uni-freiburg.de> 14. January 2017 * Linted code 1.0.0 Florian Eggenhofer <egg@informatik.uni-freiburg.de> 21. December 2016 * Initial release