Add custom syntaxerrorprovider
Merge branch 'master' of github.com:feupeu/SW401F14-Xtext
Merge branch 'master' of github.com:feupeu/SW401F14-Xtext
change default antlr error message for keywords to a more informative one
Merge branch 'master' of github.com:feupeu/SW401F14-Xtext