Update test input

Use commas instead of semi-colons as delimiters
Use commas instead of semi-colons as CSV delimiter

Fixes #1
Add space at end of error message
Refactor CSVReader creation
Statically import Mockito
Throw RuntimeException instead of System.exit
Add tests for incorrect input
Merge pull request #3 from jstanier/2-use-comma-for-delimiter

2 use comma for delimiter