Avoid issues when someone tries to access a protected / private method which would not work.

Fixed nginx config, so you can now have URLs like `/a/deep/path?param=true`
Otherwise, to achieve the same result, you'd end up with URLs like `/a/deep/path&param=true`

Get better URLs in nginx

Fixing an error when using PostgreSQL

Avoid methods that are not callable

… user

Fix for #13: error page replaces page, instead of redirecting the user to a new page

Fix for #15: Fixed bug for editSong throwing error when song_id doesn't exist

to mysql fullysupport UTF8 charset should be utf8mb4.

https://mathiasbynens.be/notes/mysql-utf8mb4

https://dev.mysql.com/doc/refman/5.5/en/charset-unicode-utf8mb4.html

Update config.php

adding view and redirect function to clean up controllers