v0.1.1-beta.2

Change log:

• New permission mask for created files (113)
• Allow only one instance at a time (fixed #1)
• Notify user that the program still running in the system tray after close main window
• Notify user of errors while connecting or when a connection is lost
• Other code improvements

Initial Beta Release

This version is in beta stage, I would be very glad if you report any issues that happens during your experimentation