Merge pull request #1 from VitSalis/master

Added user login/logout/register
replaced mail.php with php default email-validation function
Added database schema
Pulled from VitSalis
replaced mail validator with the default php function.
adder a ) that I had forgotten, and updated db_schema.sql file
Added population & migration script for countries
Corrected migration script
migration script
perfected migration script
perfected migration script
Finished population.php
new db_schema, changes to migration.php
Not full changes
Forgot to add a folder
Merge branch 'master' of https://github.com/pkakelas/endofcodes into pull
Merged from pkakelas