Arlequin - bug fix 1

• fix new window command corrupted by mis-pasted lgpl claimer

Arlequin

First stable version.

Lowest supported Firefox version:

• Linux: 64 (missing NewWindow command, but TabManager works with builtin workround) / 66.0b9 (fully work)
• Windows: same as above
• MacOS: should be same with above but not tested
• Android: not supported yet

v3.0

stupid bug: paste lgpl claimer text to wrong place