$record['extra']['callType'] will contain current call type: "->" or "::" depending if it was normal or static method call.
Gives possibility to nicely format messages "{$record['extra']['class']}{$record['extra']['callType']}{$record['extra']['function']} ..."
* PHP Versions less than 5.3.6 throws undefined constant DEBUG_BACKTRACE_IGNORE_ARGS
Notice: Use of undefined constant DEBUG_BACKTRACE_IGNORE_ARGS - assumed 'DEBUG_BACKTRACE_IGNORE_ARGS' in /vendor/monolog/monolog/src/Monolog/Processor/IntrospectionProcessor.php on line 58
* Define DEBUG_BACKTRACE_IGNORE_ARGS if not defined.
* Solution using PHP_VERSION_ID and not defining...
...DEBUG_BACKTRACE_IGNORE_ARGS
Since the code does not need neither the 'object' not 'args' keys from backtrace, we can save some memory by not requesting them.
I have a better idea planned too: first attempt getting the trace with limited back trace (limit to only about 5 results), and get the full one only if those were not enough
Recent merge of #608 misses check whether the trace exists at all at the specific index, leading to undefined offset.
```
E_NOTICE: Undefined offset: 3
```
And because the while statement became unreadable (and too long), I moved it into a separate method.
Logger maybe use in other debug classes and I must be able to skip my debug classes.
For example: new IntrospectionProcessor(Logger::DEBUG, array('Monolog\\', 'Debug'))
