HiC.scala
    Implemented regionToIndex buildInteractionGraph methods for
    HiC class.  These are not tested yet.  But the test sam file is
    read and the reads iterated through and add to the graph without any
    exceptions begin thrown.

    Next need to test if the graph is built correctly from the reads.

modified:   build.sbt
new file:   lib/ant-1.8.2.jar
modified:   src/test/scala/HiCTests.scala