Update Guice from version 3 to version 4 or above

[mmews-n4]

Guice 3 is incompatible with Java 8 (see link below). This might causes the problem that we sometimes have when starting the IDE: An endless loop of console log messages is shown and the IDE never starts. The reason for this endless loop is a Guice exception com.google.inject.internal.util.$ComputationException that also mentions ClassNotFoundException. In case the scenario occurs, check it at N4JSActivator#createInjector(String) (line 76).

• https://stackoverflow.com/questions/39918622/why-is-guice-throwing-computationexception-from-uncaughtexceptionhandler-in-mai
• Java 8 lambda definitions can break Guice's internal exception handling google/guice#757

[mmews-n4]

We depend on Xtext to update their dependency. See eclipse/xtext-core#393

[yoosiba]

@mmews-n4 if wontfix then close?

[mmews-n4]

ok