Error Logging Framework (pt 2)

Updated the old unit tests.
Still need to create new (discrete) unit tests for the new methods, and
will do so before deprecating the old logging routine.
EmberAPI\clsAPIErrorLog

- Added expanded functionality by allowing multiple log levels to be
captured.
- Old (existing) log level now defaults to Error. Will soon refactor to
use appropriate levels
- Still need to add configuration for log level to capture
- Added appropriate unit tests
Test_clsAPIImageUtils

- Minor change to interactive test question, for clarity