Added max_file_size

It's now possible to limit individual files to a max size, by
default it's 10MB.
Replaced the md5 variable with sha to reflect the truth
Replaced result dialog

Instead of getting a result dialog after uploaded a file the result
url are displayed directly in the list.
Added config option for binding to IP.
Added remote-ip logging to database.
Added timestamp of server start to secret.
Added favicon.ico
Added information output

The server now "logs" events to stdout.
Updated colours and removed double border.