opencensus 0.7.0

• Fix exporting int-valued stats with sum and lastvalue aggregations (#696)
• Fix cloud format propagator to use decimal span_id encoding instead of hex (#719)

opencensus-ext-azure 0.7.0

• Added standard metrics (#708, #718, #720, #722, #724)
• Supported server performance breakdown by operation name (#735)
• Added metrics exporter (#678)

opencensus-ext-django 0.7.0

• Updated span attributes to include some missing attributes (#735)
• Removed support for Django < 1.11 (#694)
• Allow installing with Django 2.0 and later (#697)

opencensus-ext-flask 0.7.0

• Make ProbabilitySampler default
• Updated span attributes to include some missing attributes (#735)

opencensus-ext-pyramid 0.7.0

• Updated span attributes to include some missing attributes (#735)