Add ability to specify power for JensonShannon
Rename count option for WriteDistances command, for consistency.
Alter file format for RandomAccessPointFile to include dimensions, object count and characterisation name.  Alter CalculateJudgedDistances to only calculate the distances which have not already been calculated.
Alter GetJudgedPairs to return even non-judged pairs for a particular distance metric, and remove GetJudgedPairsOctave which is not used.
Add two new characterisations - Eh70 and Eh80Ht - and commands to generate them from existing characterisations.