Autotools don't need 'ChangeLog' file anymore

All changes are tracked in 'NEWS' file
Description of upcomming version is now tracked in Github
Fix typos and style in NEWS and changelog
Delete .travis.yml before making tarball
We do not use Launchpad anymore for making new releases
Merge pull request #40 from alexander-zimmermann/master

Moving away from Launchpad...
Update README.md

Fix link
Do not ship RELEASEWORKFLOW anymore. Description is now in Github Wiki
Merge pull request #41 from alexander-zimmermann/master

Do not ship RELEASEWORKFLOW anymore. Description is now in Github Wiki
Merge branch 'master' into next