MunkiAdmin 0.4.0 Preview 2

This is a preview release of MunkiAdmin 0.4 series and contains the following notable changes since preview 1:

• Support for choosing package icon from existing icons
• Icon can now be modified from the package editor
• Support for extracting icons from copy_from_dmg and apple installer type packages. Installer package support is still a bit fragile, please report packages that MunkiAdmin can not extract.
• When deleting packages from repo, the icon file is also removed if not referenced by other items.
• Icon file is now renamed when renaming a package
• MunkiAdmin creates the icons directory when creating a new repository
• Developers and categories can now be deleted
• Modified the packages table view autosave identifier to make sure the icons column appears correctly
• Updated OS version templates
• Update the package view sidebar if the minimum number of package names is changed in Preferences