b3rtCSVReader: Parse CSV files in pure PHP

This class can be used to parse CSV files.

It opens and reads a given CSV file parsing the data in its rows using pure PHP code without using fgetcsv function.

The class reads on record row at a time and returns an array with the values for all columns.

The column separator character is configurable, so it can be a tab or anything besides the default character, which is a comma.