A new implementation of findParalogs,
more general than the previous. It now checks all cases when "nr/copies of genes from same specie" > 1.
If any of the n copies has a another specie "between" them in the tree, the function returns this specie.

The test findParalogs.t has been expanded to cover more cases:
n = 2 and paralogs
n > 2 all over the tree
n = 2 but orthologs

The tree given by paralogTest.fasta was added to the test data.