added functionality to throw on empty records in file, throw on misma…

…tch columns on records

Add unit test for toContentColumn()

Remove record with empty data from the end of csv file

Fix bug on any missput csv in columns

Another bug on fromAssocArray

Add associative array data handler

Add associative array data handler

Add `column` and `colums` fro single object use

Fixed bug

Fix to column for order of object.