Catch Fatal Errors from PHP

I use set_error_handler. It works for most cases, except fatal errors.

Follow this thread for possible solution (hack):
http://stackoverflow.com/questions/277224/how-do-i-catch-a-php-fatal-error

Start by reading the existing set_error_handler integration and the linked Stack Overflow thread for the proposed fatal-error approach. Confirm how the FireLogger library currently reports errors, then define success as fatal errors being captured and logged without breaking normal error handling.

Written by the indexing model from the issue text.