Check for any ignored exceptions
Add test
Notification: be more concrete in what file to skip

The old regexp skips even files unrelated to the Bugsnag Ruby project.
Namely, it was skipping stack traces for my bugsnag-demo project.
The new regexp ensures that it skips only Bugsnag Ruby files.
Merge pull request #132 from kyrylo/stacktraces-skipping-fix

Notification: be more concrete in what file to skip
v2.2.1
Add more ignore classes
Eliminate allocations in run_callbacks

If there are a large number of models running callbacks, which is
possible multiple nested levels of autosave assocations, the short-lived
objects in this method can introduce non-negligible GC pressure.

As far as I know, kind will always be a symbol, so the to_s conversion
is unnecessary.

We can also pull the array to a constant which is allocated once, ever,
instead of once per model/request.
Use the constant "KINDS" instead of undefined "kinds"
Merge pull request #138 from samwgoldman/callback_allocations

Eliminate allocations in run_callbacks
README: fix link
Add missing item to changelog [Closes #142, Closes #116]
Merge pull request #136 from bugsnag/ignore-classes

Add more ignore classes
Merge pull request #123 from bugsnag/ignore-caused

Ignored exceptions don't behave as expected with exception chaining
README: add clarification about callbacks
README: fix Runglish

Thanks-to: Jessica Dillon <jessica@bugsnag.com>