web/olddownload: add FFmpeg 2.1.6

Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
web/olddownload: add FFmpeg 0.5.15
web/download: add FFmpeg 2.4.4
web/legal: move Legal Threats to bottom of page

This places Legal Threats under all of the more useful stuff.

Signed-off-by: Lou Logan <lou@lrcd.com>
Signed-off-by: Timothy Gu <timothygu99@gmail.com>
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
web/download: Add FFmpeg 2.5

Signed-off-by: Michael Niedermayer <michaelni@gmx.at>