remove deprecated aggregation method calls in favor of new methods

Thank you Ben, please merge. I'll add it in my next PR coming tomorrow ( was waiting for this change ) 

Regards,
Max Kremer

> On Aug 8, 2014, at 6:46 PM, Ben McCann <notifications@github.com> wrote:
> 
> In src/main/java/org/mongojack/Aggregation.java:
> 
> > @@ -49,4 +53,12 @@ public DBObject getInitialOp() {
> >      public DBObject[] getAdditionalOps() {
> >          return additionalOps;
> >      }
> > +
> > +    public List<DBObject> getAllOps() {
> > +        List<DBObject> allOps = new ArrayList<DBObject>();
> > +        allOps.add(initialOp);
> > +        allOps.addAll(Arrays.asList(additionalOps));
> > +        return allOps;
> > +
> Sure, that'd be nice. Not a big deal. I'll merge this either way. Just let me know
> 
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