Revised method CheckStringIsPositiveNumeric
	Method now only checks for numeric value
	Also renamed method to CheckStringIsNumeric
Revised checkLengths
	Added extra validation to make sure one side cannot equal sum of two
	sides
Revised Tests
	Revised assertions to use String.Contains() method instead of matching
	the entire string
All tests should now pass
Merge pull request #4 from noah-de/development

Development