Fix logger to properly output text that contains '%' symbols.

Remove error suppression.
Fixes #413

Request limiter - prevent hitting Telegram's API limits

# Conflicts:
#	src/Telegram.php

Debug command

Crontab-friendly script

Add extra tests for getCommandsPaths method.

Fix for channel_post and edit_channel_post commands

Fix for channels where chat_id can be a text (developers should use getChat() to get numeric value!)

Make logger more flexible

Make access to the database easier

Add 'username' field to 'chat' table

Use PHP_EOL for new lines.

Fix param types

Fix Telegram request parameters

Due to the way that Telegram interprets the request URL, http_build_query that Guzzle uses doesn't work properly. Instead, we now convert all arrays to JSON encoded strings, which get interpreted correctly!