Merge pull request #57 from kpartlow/master

Updated formatting to show assertion failures.
Increased Code Coverage on TestResultsFormatter
Increased Code Coverage on CellInfo and CellTypes
Increased Code Coverage on TestColumn
Fixed Error in TestCellInfo with Dates not fully writing out the date and bringing it back.
Corrected comment
- updated code to use propert constant
Updated CellInfo, CellTypes, and Column tests to improve coverage
Merge branch 'master' of https://github.com/jdereg/n-cube