Rollbar

- Fix bug with local variable gathering that was breaking when getting the arguments for a class constructor.

- Request headers are now scrubbed, [pr41](https://github.com/rollbar/pyrollbar/pull/41).

- `exception_level_filters` can now take a string that defines the class to filter, [38](https://github.com/rollbar/pyrollbar/pull/38).

- Added an option to disable SSL certificate verification, [36](https://github.com/rollbar/pyrollbar/pull/36).
- Added `__version__` specifier to `__init__.py`.

New features:

- For Tornado requests, gather the request start time. See [33](https://github.com/rollbar/pyrollbar/pull/33)
- Add handler which uses Tornado's `AsyncHTTPClient`. To use this, set your 'handler' to 'tornado'. See [34](https://github.com/rollbar/pyrollbar/pull/34)

- Improvements to RollbarHandler logging handler. It now:
- extracts more information out of each record (i.e. metadata like pathname and creation time)
- uses the format string, with arguments not yet replaced, as the main message body. This will result in much better grouping in Rollbar.

Note about upgrading from 0.8.x: unless you are using RollbarHandler, there are no breaking changes. If you are using RolbarHandler, then this will change the way your data appears in Rollbar (to the better, in our opinion).