[2.0.4] Settings.getOS() and Env.getOS() return different values --- to be checked

[Peterd]

Per http://sikulix-2014.readthedocs.org/en/latest/globals.html#get-information-about-the-runtime-environment the following code should return the same value:

```
print Settings.getOS() # 1
print Env.getOS() # MAC
```

So it looks like `if Settings.getOS() == OS.MAC:` should work according to the docs, but it fails and tells me I'm not on a Mac unless I use `Env.getOS()` instead.

I can also use `Settings.isMac()` here, but I was following the docs and it tripped me up for a bit.

[Karl (k-d)]

print Settings.getOS()
print Env.getOS()
print Settings.getOSVersion()
print Env.getOSVersion()

Output:
0
WINDOWS
10.0
10.0