Changes

Changelog

• added: Added log system to find errors faster. While debugging there are more logs and it is easier to follow the stack trace
• added: New exception (Action failed)
• added: Added new param for mail trakings
• fixed: Solved bug that did not let to store a notification when user did not have set preferences for that theme
• fixed: Avoided to send mails through a closed socket
• improved: Removed exceptions from Models to avoid unexpected exceptions
• improved: Code refactored && syntax updated
• added: