added license
set default behaviour for line endings in git
added CONTRIBUTORS file
added Maven POM
copy class src/nipgm/util/DatabaseUtil.java from https://github.com/felixwiemuth/NIPGM at commit 6fa2428f5d4fb7c343179f0b0766605e12b59569
adapted to project
adapted to project code style rules
added dependency: myBatis framework for database persistence
class to provide database access