Opencensus

Released 2019-08-26

- Added `http code` to `grpc code` status code mapping on `utils`
([746](https://github.com/census-instrumentation/opencensus-python/pull/746))
- Updated `django`, `flask`, `httplib`, `requests` and `pyramid` modules
([755](https://github.com/census-instrumentation/opencensus-python/pull/755))
- Updated `requests` module
([771](https://github.com/census-instrumentation/opencensus-python/pull/771))

Released 2019-08-16

- Fix GCP resource loading for certain environments
([761](https://github.com/census-instrumentation/opencensus-python/pull/761))

Released 2019-08-05

- Added `set_status` to `span`
([738](https://github.com/census-instrumentation/opencensus-python/pull/738))
- Update released stackdriver exporter version

Released 2019-07-31

- Fix exporting int-valued stats with sum and lastvalue aggregations
([696](https://github.com/census-instrumentation/opencensus-python/pull/696))
- Fix cloud format propagator to use decimal span_id encoding instead of hex
([719](https://github.com/census-instrumentation/opencensus-python/pull/719))

Released 2019-05-31

- Refactored PeriodicTask
([632](https://github.com/census-instrumentation/opencensus-python/pull/632))
- Make ProbabilitySampler default, change default sampling rate
- Pass span context to samplers, allow samplers to override parent sampling
decision

Released 2019-04-24

- Add cumulative API
([626](https://github.com/census-instrumentation/opencensus-python/pull/626))