Add a note to domain-specific-languages
Add a note to domain-specific-languages

Fixes #15
TUDelft-IN4303-2016/TUDelft-IN4303-2016.github.io,TUDelft-IN4303-2016/TUDelft-IN4303-2016.github.io,TUDelft-IN4303-2016/TUDelft-IN4303-2016.github.io