adding new data files, restructuring the tests mock_data folder
Merge branch 'master' into feature/testing
renaming files
adding a butt load of data files
removing console.log
refactoring the handler unit tests to use the new fixture and mock_data
refactoring layout unit tests
refactoring vis.js unit tests
refactoring the index.js unit test
adding reference to lodash
Merge branch 'master' into feature/testing
troubleshooting bugs in pie chart testing
Merge branch 'master' into feature/testing
building up pie_chart testing
adding unit tests for pie chart
removing data file
Merge branch 'master' into feature/testing
Resolved conflicts on merge with master. This commit closes issues #1914, #1915, and #1920.

Conflicts:
	test/unit/index.html
	test/unit/specs/vislib/components/tooltip/_render.js
	test/unit/specs/vislib/fixture/mock_data/date_histogram/series.js
	test/unit/specs/vislib/fixture/mock_data/series/_data0.js
	test/unit/specs/vislib/fixture/mock_data/series/data0.js
	test/unit/specs/vislib/visualizations/column_chart.js
Closes issue #1919. Adding unit tests for the line chart
Closes issue #1918. Adding unit tests for area chart
adding testing for the column chart visualization