v0.4.0

• added working plugin manager
• added Plugin Actions API
• added Plugin Filters API
• added MIT license for a project
• added handling for uncaught TokenMismatchException
• added server-side confirmations for removing a note (in case of disabled JavaScript)
• added possibility to specify database table prefix (both in web installer and .env file)
• added possibility to save quickform using Ctrl + S
• added artisan db:install command to install Codice without leaving the terminal
• added flatpickr instead of bootstrap-datetimepicker
• changed month names in calendar to have fixed length so that arrows don't change their position
• changed some class names and namespaces for better code structure
• changed note timestamp to be link to detailed view and removed separate button
• changed laravel-ide-helper to be dev-only dependency
• fixed calendar fetching data from all users instead of currently logged in
• fixed calendar generating wrong date ranges for some months
• fixed broken JavaScript on some pages (login, reset password etc)
• fixed form for creating/editing labels which could potentially fail due to unknown label color
• fixed month name in Calendar day view
• removed unfinished search form from the core
• removed button for (re-)inserting welcome note on demand
• removed unused directories from /app
• updated external dependencies
• various minor fixes