fixed reference to Tiger in Spoofax on github
fixed reference to Tiger in Spoofax on github

TUDelft-IN4303-2016/TUDelft-IN4303-2016.github.io,TUDelft-IN4303-2016/TUDelft-IN4303-2016.github.io,TUDelft-IN4303-2016/TUDelft-IN4303-2016.github.io