Update CsvReader.php

I test it with several cases, and I think this update should solve the problem I talked about last week in my comment to the issue
Update CsvReader.php

correction of patternAlphaNum
Create test4.csv

added file for count debug with empty lines
Update CsvReaderTest.php

debug count method with lines ended by delimiter
Merge pull request #2 from acornu/patch-1

Update CsvReader.php