Continent fixes
Merge pull request #5 from siesqo/contintent-fixes

Continent fixes
Only chmod if the file exists
Bugfix: the token-check would always resolve

When the $useToken-parameter is true, a field is added by the code. In the code
that validates the token the field was used, but the return of getValue() would
return the value that was set during creating the field instead of the one in
POST/GET.

Therefore we use from now on the raw POST/GET-data to check if a token is
available.
More consistent with the rest of SpoonForm, and no SpoonFilter dependency.