Links to applications using frei0r needs updating

[reahari]

The links to applications using frei0r contain old or dead links. For example

• ffmpeg url is incorrect (https://g=ffmpeg.org/ , probably spelling mistake)
• Pure Data link is incorrect
• Open Movie Editor's url resolves but the project hasn't seen any activity since 2009. Hardly recent.
• DVEdit's domain has expired/squatted
• Gephex domain gives a security error (probably expired
• MøB's url has expired
• Flowblade uses old google projects url, should point to https://github.com/jliljebl/flowblade