Web GUI Login and Minor Implementations

[drego85]

Integrated authentication for the web interface (optional) and tag titles for major icons.

[ael-code]

I really appreciate the contribution, but unfortunately I won't merge these changes.

If you really think that is important you should move the "code style refactoring" ( mainly I saw spaces rearrangements ) in its own commit.

Moreover I like to keep things simple, so I usually prefer to integrate basic authentication for such a small service through the web server itself.

Thanks again :)