Updated structure of tests
Moved ChartGroup tests into charts directory.
Pearson correlation calculation on raw inputs.
Calculating correlation coefficients on groupings.
using proper equality operator in takeWhere and valueForKey
jshint equality is now checked
refactored parameters to chartFilterHandler to make more sense
Merge pull request #93 from Stavrakakis/master

ICS-49, ICS-71: Fix to automargin
Updated structure of tests
Moved ChartGroup tests into charts directory.
Pearson correlation calculation on raw inputs.
Calculating correlation coefficients on groupings.
Fixed jsdoc error for array of arrays.
Tests for lastElement array helper.
Removed duplicate test.
Removed unnecessary bind on chartFilterHandler.
Tidied up correlation calculations.
Removed zip containing library code and docs.
Fixed test for correlation calculation on a filtered chart.
Merge branch 'upstream'