Controller method to run the cron. Requires a valid cron key supplied as an argument in the url.
Takes a language code eg. php, cpp, html4 and converts it to its description eg. PHP, C++, Html 4 (Strict).
Counts pastes in the database to be used when generating pagination
Creates a paste in the database. This doesn't take any arguments as it's easier to use the input class.
Finds paste that need to be deleted and deletes them.