Merge pull request DataDog#346 from palazzem/django-docs

[django] update docs: adding the middleware is not required

bumping version 0.9.0 => 0.9.1

Merge pull request DataDog#302 from benjamin/flask-stacktrace

Attach stack trace to Flask errors

bumping version 0.8.4 => 0.8.5

bumping version 0.8.3 => 0.8.4

bumping version 0.8.2 => 0.8.3

bumping version 0.8.1 => 0.8.2

bumping version 0.8.0 => 0.8.1

[docs] minor changes on docs

bump version to 0.7.0