fix failing tests in master
Merge pull request #150 from voxmedia/fix_integration_spec

Fix failing integration tests in master
Basic support for async events
Allow configuration of app_dirs_pattern
Update example for clearing context

In ee77e94dfd8b86a7375414fa40f72d1a72e74bd0 the `clear!` method was
changed from an instance method to a class method.

`Raven.context` returns an instance, so Raven.context.clear! does not
work.
Merge pull request #154 from jage/patch-0

Update example for clearing context
Add Ruby 2.1.0 to travis
Merge pull request #155 from lkdjiin/ruby21

Add Ruby 2.1.0 to travis
Use SVG for status badges in README

https://github.com/getsentry/sentry/pull/1128 can't be merged since reStructuredText is required, but at least raven-ruby can benefit from SVG badges :octopus:
Merge pull request #156 from seanlinsley/patch-1

Use SVG for status badges in README
Update Sidekiq support to 3.0 #157
Merge pull request #158 from nateberkopec/sidekiq-3

Update Sidekiq support to 3.0. Close #157.
Add async documentation to the README
Merge pull request #163 from voxmedia/async_reporting

Basic support for async events
Use e.to_s instead of e.message

Some exception have nil for it's message, and it makes it unserializable
Merge pull request #162 from huntrax11/master

Use e.to_s as fallback for e.message
failing tests for #164
#164: correct JSON encoding for Ruby symbols
Ruby 1.8 compatibility
Update README tagging examples to use symbols