Favicon: replace the old asymetrical one with this redrawn and bigger logo

[SebastJava]

This one is better and also bigger, which is important for such a small favicon. See how it doesn't look bad, sitting next to Facebook and other modern ones. (And see how this old LM Forums needs to be changed.)

Short story: It is all okay and all ready.

Long story: Found in mint-main.html:

    <!-- Favicon -->
    <link rel="shortcut icon" href="img/favicon.ico">

And the old favicon is set at 48x48px. So, to make it safe and simple, i did this:

• My version was created in Inkscape.
• Opened in GIMP at 48x48px resolution.
• GIMP > Export to favicon.ico without any compression.

Closes #5

[SebastJava]

Words about colour:

I forgot to mention this #00B894 colour on this new favicon. I think that if you go with a theme that comes with a different colour, then the logo colour should be changed accordingly. Also, i have trouble working with this 90° hue, but that's a larger topic to be discussed somewhere else...

This is just another suggestion here. If you want to keep your 90° hue, then just tell me exactly what #HEX colour to use...