Implement the standardized Development Configuration Options

[akornich]

The following config options are independent of each other:

enabled
* Enable or disable Rollbar in your project. This can be changed at runtime with Rollbar::enable() and Rollbar::disable() or through Rollbar::configure().
* If this is false then do absolutely nothing, try to be as close to the scenario where Rollbar did not exist at all in the code.
* Default: true
NOTE: This option is already implemented sometime ago. Verify its implementation logic to be consistent with other SDKs...

transmit #163
* Should the SDK actually perform HTTP requests to Rollbar API. This is useful if you are trying to run Rollbar in dry run mode for development or tests.
* If this is false then we do all of the report processing except make the post request at the end of the pipeline.
* Default: true

logPayload #164
* Log the payload body to the configured logPayloadFile (default: "rollbar.payloads").
* If this is true then we output the payload to standard out or a configured logger right before transmitting.
* Default: false

verbose (or verbosity) #???
* This configuration option controls the verbosity of the internal logs of the SDK.
* The value is one of the following with an increasing level of verbosity:
* The levels should follow: https://tools.ietf.org/html/rfc5424
* Additionally, there will be none level which makes the SDK quiet.
* Default: none

The defaults could be environment-dependent and we would just need to work out what those should be.

[akornich]

looks like most of these (if not all are already implementing). taking into account that we are about to deprecate this repo, let's close it.