#330 #336 Use streaming for CifCollectUtils

Looks pretty slick, one formatting problem though.

Formatter says (around line 57)

    public static void collectEvents(ComplexComponent comp, Collection<Event> events) {
        getComplexComponents(comp)
                .forEach(cc ->
                {  // <-- and checkStyle complains "Block start curly brace '{' should be on previous line."
                    cc.getDeclarations().stream().filter(decl -> decl instanceof Event)
                            .forEach(decl -> events.add((Event)decl));
                });
    }

Closes #330 (closed) #336 (closed)