Fixes #216

Added dilution factor to scale concentrations back up to stock plate. Obviously
this makes it a bit variable.

Fixed standard deviation of for intermediate coefficients. Was for some reason
dividing sum of square differences from mean by 3 when there are 4 control columns.

Still to look at whether Sample Managment want coefficient of variation looked at as
it is not calculating it correctly. However, this commit now being brings the Clarity
implementation to be equal to SequenceScape's.
Fixed date when pushing to test coverage
Fixes #212

Concentration was not being added to analytes correctly because
namespace was not being used.
Oops. Forgot to update test
Merge pull request #218 from wtsi-clarity/pico_analysis_results_fix

Fixes #216
Merge pull request #220 from jbeast/dtx_parser_tests

Fixes #220 (the Pico Analysis "Script Error" Error)
Preparation for Release 0.58
Merge pull request #221 from wtsi-clarity/devel

Release 0.58