Added dm4reader to __init__.py and dm4 functions of io_image

Reader for dm4 incorporated into code
New translator for OneView data files.  Initial commit.

SHO Guess in serial and parallel modes
SHO FIt works in serial, but there are still problems with the parallel implementation.

Cnms dev

Ensure that the labels matrix is 2d

Fixed the group name to have a numbered suffix

Cnms dev

New movie translator added
Added support for dm3 files

Broadcast U and S.V to speed up window cleaning when keeping components.

Added print statement of batch size
Calculate if the update string should be printed in the if statement.

Step size is limited to 1/4 of image size to match limits on windows.

Counting changes in non-cube windowing methods

Added limits to window sizes:
      lower limit - 2*step size 
      upper limit - 1/2 of image size
Slight change in counting when rebuilding the images

Now saves file handle after call to repack so it doesn't get closed.
Fixed the call to get the Component Indices dataset

Switched from 1D FFT to 2D FFT
Added new cleaning method that creates a reconstructed image for each principal component

Commented out imshow call

Updated for new location of linkformain

Added batch processing method for creating windows from an image.

New method that builds and cleans batchs of windows at a time.

Changed the 'labels' attribute of Component_Indices and S from 'component' to 'Principal Component'

Added datasets for the removed noise, the fft of the clean image, and the fft of the removed noise
*_Indices and *_Values datasets all have 'label' and 'units' attributes
Added root level 'data_type' attribute

Uptaded translator to use new Translator base class.

Use the whole label name rather than just the 1st character

Updated to use new methods from Translator baseclass
Uses new calc_chunks function

Removed _linkformain for Translator baseclass
Added linkformain function to hdf_utils.py