Updated structure of tests
Moved ChartGroup tests into charts directory.
Pearson correlation calculation on raw inputs.
Calculating correlation coefficients on groupings.
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.
Refactored calculating correlation from raw values.
Updated tests for correlation.fromValues to include exceptions.
Merge pull request #94 from tpkelly/master

Updates changelog
Calculating correlation coefficients on an entire DataSet.
Checking for non-numeric data in correlation calculations.