Adding error_reporting till lesson 20

adding facebook page link

fixing small issue with Less-55

Small issue of redirection with Less-55

Adding same correction to other challenges as last one

fixing small issue in resetting DB on successful completion of challenge

Add updated index pages, removing result.txt

fixing warning suppressing in challenges

fixing issue with autopopulate script

fixing issue with autopopulate script

fixing small issue with Database setup for challenges

adding Randomization to Less 54,55,56,57,58,59,60,61,62,63,64,65

fixing small issue with setup-db

fixing small issue with setup-db

Fixing small issue with readme