Update installation procedure
Increase required PHP version
Increase PHP version in repository readme file
Implement front controller
Add info about the project to composer.json
Load all libs in libs/init.php
Add extension to LICENSE, README, VERSION files
Replace license.php with controller's action
Fix bug in the main exceptions catcher
Make a controller for widget gateway
Add "visitorTrack" event
Prepare a request before send
Create controller for button image
Mark "start_xml_output" function as deprecated
Fix codding style
Add PHP Code Sniffer to dev dependencies
Make flat_cp tool portable to systems without GNU sed
Add routes-based access control
Mark function "force_password" as deprecated
Use route name instead of path in controllers docs