Add an IPython Notebook to show some usage of the pb_dagcon internal
   Track Bug #21512

[git-p4: depot-paths = "//depot/software/bioinformatics/tools/pbdagcon/": change = 121716]
Merge remote-tracking branch 'p4/master'

Add an IPython Notebook example to show how to use PB_DAGCon for seperating haplotype sequences and generate 100% accuracte consensus