Minor security patch release

Fixes #13

Minor changes

• Added close and minimize app buttons on the main window itself.
• Currently not building macOS app due to signinig application issues.
• Allowing only a single instance of clipper to be running at a time in release mode.

Linux AppImage

AppImage available for distribution on linux platform

Linux App Tray Icon Bug Fix

This release fixes the bug in tray icon for linux debian.

MacOS Support

This release adds file for MacOS as well in format dmg and zip

First Release

First Release of Clipper Application 🎉🎉