Created Troubleshooting issues (markdown)

Troubleshooting-issues.md

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+Telethon makes use of the [`logging`](https://docs.python.org/3/library/logging.html) module, and you can enable it as follows:
+
+```python
+import logging
+logging.basicConfig(level=logging.INFO)
+```
+
+You can also use it in your own project very easily:
+
+```python
+import logging
+logger = logging.getLogger(__name__)
+
+logger.debug('Debug messages')
+logger.info('Useful information')
+logger.warning('This is a warning!')
+```