jet hypo - start work on hypo to select events with a dijet formed first/seond or second/thord jets from an ordered list.

The requirements for the hypo are chose a opair of jets from fixed locations in an ordered sequence of jets.

Thei sMR contains a Filter (to be used as a Condition filter) that orders the
jets in pt, and then selects jets within a range begin, end (int indices).

For the particulr hypos in question, the indeces will be set ot (0, 2), or (1, 3).
    TrigHLTJetHypo/src/RangeFilter.cxx, x

Fiters are now accesed through a pure interface:
       TrigHLTJetHypo/src/IHypoJetVectorFilter.h
       TrigHLTJetHypo/src/RangeFilter.h
       TrigHLTJetHypo/src/ConditionFilter.h

New file to accumulate predicates useful when using HypoJetVector with the STL
    TrigHLTJetHypo/src/HypoJetPreds.h

New ctests for RangeFilter:
    TrigHLTJetHypoUnitTests/CMakeLists.txt
    TrigHLTJetHypoUnitTests/tests/RangeFilterTest.cxx