Merge pull request #65 from Septarius/dev

Index unknown packed files better
Fixed Control Characters in JSON

From: http://docs.python.org/3.3/library/json.html
If strict is False (True is the default), then control characters will
be allowed inside strings. Control characters in this context are those
with character codes in the 0-31 range, including '\t' (tab), '\n', '\r'
and '\0'.