Antivirus edit

I think that could be good having (example) _firewolf.globalEnvironment()_ in Lua pages to add global APIs (_G) in it. It should display a warning into client.

It can return _bGlobal_ boolean, that equals _true_ if user accepts or _false_ if  user denies.
For example.

``` lua
local ok = firewolf.globalEnvironment()
if ok then
--Global environment ON
else
--Global environtment OFF
end
```
