codecompliance check: fixed authors check

now it actually works! yay!

testing is the future.
legal: added more recent authors to copying.md
Merge branch 'master' of github.com:SFTtech/openage
doc: fixed typo in copying.md
audio: fixed in memory sound loader
audio: game_main now loads in-memory instead of dynamic sounds
Merge branch 'fix_audio'
buildsystem: added sfttech/opusfile ppa to .travis.yml
Merge pull request #99 from mic-e/travisopt

buildsystem: added sfttech/opusfile ppa to .travis.yml