Fix params filtering

Neither Symbol nor String in Ruby has `#in?` method.
So this filtering raises another exception instead
of sending it:

    Exception while reporting exception to Rollbar:
    undefined method `in?' for :session_id:Symbol

This patch fixes expressions to by Rubista not Pythonista :D
bump version to 0.9.7, update changelog, add @ixti to THANKS, convert thanks file to markdown.
Fix bug introduced in 0.9.0 where setting `config.enabled = false` in `config/initializers/rollbar.rb` would be overwritten by subsequent calls to `Rollbar.configure` (as happens normally when using inside Rails).

Bump version to 0.9.8
fixed capistrano recipe on 1.9.2, closes #35
add example of disabling in "test" env to initializer template
Merge branch 'patch-2' of https://github.com/dimko/rollbar-gem
bump version to 0.9.9
Scrub session as well. Add :secret_token to default scrub list. Fix bug with fparam filtering when params is nil.
filter secret token by default

* should ignore rack_env.action_dispatch.secret_token
merge #37
bump version to 0.9.10
clarify which token to use
provide a default environment name when used outside of Rails and none is set
Merge branch 'master' of github.com:rollbar/rollbar-gem
fix compatability issue with rails 4. thanks @johnknott for the patch.
adding ability to parse json params, fix concurrency issue, removing redundant 'GET' and 'POST' keys from request payload, add PUT param test
fix changelog
Add custom_data_method config option. Should be a lambda that returns a hash; the hash will be included as value of the 'custom' key in the payload.
change initializer template to disable reporting from the "test" environment
bump version to 0.9.14, update changelog