Perl Executing Browser v2.0.0

• redesigned PEB based on QtWebEngine instead of QtWebKit
• updated Perl Scripts API - ability to select per script Perl interpreter
• updated Perl Scripts API - new syntax to call file or directory selection dialogs
• updated Application Directory handling - point to an Application Directory from command line
• unified logging of all JavaScript and Perl errors in the command-line console
• DEB package
• minimal context menu
• no support for interactive scripts
• no JavaScript Alert, Confirm and Prompt
• no AppImage support
• no Windows support