Os integration: .plist file OSX, recent documents, installer configuration

[eliascotto]

• Fixed Electron installer configuration on Debian/Redhat systems (icons and descriptions).
• Added support for open .scap files on OSX. It requires to modifying the info.plist file necessary to the OS. For plist keys used on OSX see: https://developer.apple.com/library/content/documentation/General/Reference/InfoPlistKeyReference/Articles/CoreFoundationKeys.html
• Added support for manage recent documents by OS side. https://electron.atom.io/docs/api/app/#appaddrecentdocumentpath-macos-windows