Backup File plugin for Sublime Text 2
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Copy "BackupFile.py" file to ~/.config/sublime-text-2/Packages/User/
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Copy, o merge if already exists, "Side Bar.sublime-menu" file to ~/.config/sublime-text-2/Packages/User/
Right click on any file and select "Backup File" option. It creates a new file with suffix "-YYYYMMDD-HHMMSS".