build on Travis Mac only on pull requests
build on Travis Mac only on pull requests
LorenzoBettini/packtpub-xtext-book-2nd-examples,LorenzoBettini/packtpub-xtext-book-2nd-examples,LorenzoBettini/packtpub-xtext-book-2nd-examples,LorenzoBettini/packtpub-xtext-book-2nd-examples