Fixed import error in WaveGenerator/Utilities/MapMaker.py

Not sure if you're having issues with this on your machine, but this was causing an import error when I tried to run WaveGenerator.py.

    Traceback (most recent call last):
      File "WaveGenerator.py", line 7, in <module>
        from Utilities import MapDecomposingThread, Parameters, WaveFileThread, \
      File "/home/dfornika/code/epigenetics-software/Epigenetics/WaveGenerator/Utilities/MapMaker.py", line 8, in <module>
        from WaveGenerator.Utilities import ReadModels
      File "/home/dfornika/code/epigenetics-software/Epigenetics/WaveGenerator/WaveGenerator.py", line 7, in <module>
        from Utilities import MapDecomposingThread, Parameters, WaveFileThread, \
    ImportError: cannot import name MapMaker