fixed instantiation of UnicodeDecodeError in force_text

this seems to be a leftover from copying Django's force_text
function
(https://github.com/django/django/blob/master/django/utils/encoding.py#L98).
Note that Django uses its own DjangoUnicodeDecodeError that stores obj
on itself and then calls the super class without obj.
Fix getting error data from django template.

StringOrigin instances don't have loadname attribute.
Merge pull request #480 from asvetlov/master

Pass family and loop into aiohttp connector ctor
Merge pull request #476 from pazur/patch-3

Fix getting error data from django template.
sync ssl cert with certifi
Dont automatically log stacks for exceptions

Fixes GH-413, GH-477
Expose auto_log_stacks option in Flask extension
Expose constructor parameters in lazy init_app
Added some details about logging and lazy init in Flask documentation
Store the last event id in g.sentry_event_id if possible
Document g.sentry_event_id
Merge pull request #484 from noirbizarre/flask-tuning

Flask tuning
Make raven.handlers.logging.SentryHandler#_get_targetted_stack accept `record` to be able to process the stack according to the logging message level or other record properties.
Merge pull request #486 from warvariuc/targetted-stack-record

Make raven.handlers.logging.SentryHandler#_get_targetted_stack accept `record`
Pass kwargs from EventletHTTPTransport to super class

This makes Eventlet transport support configurable timeout (and possibly
some other transport parameters).
Remove vim swap file
doc: add missing "for"
Merge pull request #490 from blueyed/rm-swapfile

Remove vim swap file
Merge pull request #491 from blueyed/doc-fix-typo

doc: add missing "for"
Dont fail when last_event_id is unavailable (fixes GH-483)