[Website] Installer requires Win7 SP1, but website mentions XP

[Tarnyko]

Website download page mentions "Freenet requires Windows XP or later.", but it seems to require Windows 7 SP1 instead.

[desyncr]

Newer innosetup defaults to Windows 7 SP1.

Ref:

• https://github.com/jrsoftware/issrc/commit/d1fd254b00e295c7710acc881f4ba244aadb04ae
• https://github.com/jrsoftware/issrc/commit/d1d14e6155ae68ce388a504e81dd5f3b6a03c02a

[desyncr]

@ArneBab We should update the documentation where required (AFAIK https://github.com/freenet/website and some references on the Wiki).

Let me know what you think and I'll move it forward.

[ArneBab]

@desyncr you’re right, yes. Would be awesome if you’d do it!

[desyncr]

@ArneBab Updated docs and Wiki pages:

• https://github.com/freenet/wiki/wiki/Installing-on-Windows
• https://github.com/freenet/wiki/wiki/Projects

[ArneBab]

I now also updated the French and Russian translation.