Address David Alexander's comments
[tracking bug 25389]

[git-p4: depot-paths = "//depot/software/bioinformatics/lib/cpp/ConsensusCore/": change = 136795]
Fix problems with Interval being typedef'd ... twice
[tracking bug 25389]

[git-p4: depot-paths = "//depot/software/bioinformatics/lib/cpp/ConsensusCore/": change = 136800]
Make sure to reset the column contents, no matter what
[tracking bug 25389]

[git-p4: depot-paths = "//depot/software/bioinformatics/lib/cpp/ConsensusCore/": change = 136802]
Make Interval into a real class, not just a typedef
[tracking bug 25389]