middle types for ranked and unranked trees

alib2data/src/tree/RankedTreeBase.h

alib2data/src/tree/RankedTreeWrapper.cpp

alib2data/src/tree/RankedTreeWrapper.h

alib2data/src/tree/Tree.h

alib2data/src/tree/UnrankedTreeBase.h

alib2data/src/tree/UnrankedTreeWrapper.cpp

alib2data/src/tree/UnrankedTreeWrapper.h

alib2data/src/tree/ranked/PrefixRankedBarPattern.cpp

alib2data/src/tree/ranked/PrefixRankedBarPattern.h

alib2data/src/tree/ranked/PrefixRankedBarTree.cpp

alib2data/src/tree/ranked/PrefixRankedBarTree.h

alib2data/src/tree/ranked/PrefixRankedPattern.cpp

alib2data/src/tree/ranked/PrefixRankedPattern.h

alib2data/src/tree/ranked/PrefixRankedTree.cpp

alib2data/src/tree/ranked/PrefixRankedTree.h

alib2data/src/tree/ranked/RankedPattern.cpp

alib2data/src/tree/ranked/RankedPattern.h

alib2data/src/tree/ranked/RankedTree.cpp

alib2data/src/tree/ranked/RankedTree.h

alib2data/src/tree/unranked/UnrankedPattern.cpp