Code for writing Summary Index file and Images is overly complex

[towsey]

Describe the bug

The code for the writing of summary indices to csv file and for the presentation of image tracks is unnecessarily complicated. There are three issues:

1. The initial writing of the Summary indices to csv file includes three unnecessary columns containing zeros. Columns are P, R and T and header names are AvgEntropySpectrum, VarianceentropySpectrum and EntropyPeaks. these are just the old names for the indices that are now written to Columns O, Q, and S respectively.

2. There are many unnecessary inclusions (e.g. zero crossings in the L and R channels) in the IndexProperties file resulting from work done with Yvonne Philips checking for channel integrity. these are special case indices and not usually required.

3. The translation dictionary is no longer useful and should be removed.

Describe the solution you'd like

1. Refactor the SummaryIndexValues class to remove writing of unnecessary columns to csv file
2. Take out all indices in the IndexProperties config file to do with channel integrity and put them in a separate Properties file.
3. remove the implementation of the Translation Dictionary.