allow configuring exception level filters:true/false as a global setting for manual reporting

[erated]

Hi there, Currently if we manually report an issue through Rollbar.error(e), if we want Rollbar to take into consideration our exception level filters, we need to add a silly flag (:use_exception_level_filters => true).

Either cancel this flag, or allow for us to set it globally as a rollbar configuration setting.

This issue just creates dirty code on our end..