User Story 10: As a user I should be able to read and solve a Sudoku game from a TXT file

Description.
Module reader has been added
Parser for .txt files has been included

Signed-off-by: xaindeneb <xaindeneb@gmail.com>
Merge pull request #4 from pysudoku/txtparser

User Story 10: As a user I should be able to read and solve a Sudoku gam...