When using the "creates" option with the uri module, set changed
to False if the file already exists. This behavior is consistent with
other modules which use "creates", such as command and shell.
consider the following response body (content) of a REST/JSON webservice containing escaped quotation marks:
```json
{ "key": "\"works\"" }
```
decoding this string not as raw will lose the backslash as JSON escape. later json.loads will fail to parse.
Inspired by [this thread](https://groups.google.com/forum/#!topic/ansible-project/kymtiloDme4) on the mailing list and the following python shell code:
```python
import json
string=r'{ "key": "\"works\"" }'
json.loads(string)
json.loads(string.decode('raw_unicode_escape'))
json.loads(string.decode('unicode_escape'))
```
