Added setters for FieldWeights, MatchMode, and SortMode.  Added flag to ...

...get() to make it respect sort order.


I needed to make some changes and saw the issue posted at: https://github.com/scalia/sphinxsearch/issues/3

I don't know if the other person has submitted a pull request yet, but my changes include the setMatchMode method from the issue.  This is my first pull request, so please accept my apologies if I've made any mistakes and feel free to correct me.

Thanks!