Be consistent with username label. Change User Name to Username.
Remove LGUnzipper class.
Merge pull request #232 from lindegroup/username-name

Be consistent with username label. Change User Name to Username.
Merge pull request #233 from lindegroup/rip-unzipper

RIP unzipper
QuickFix: rename jss-autopkg-addon to JSSImporter
	- Only for install check & installer
Changed "jss-autopkg-addon" to "JSSImporter" in strings.
Refactor testInstallJSSImporter.
Refactor installJSSImporter.
Refactor runJSSImporterInstaller.
Refactor jssImporterUpdateAvailable.
Refactor jssImporterInstalled.
Refactor getJSSImporterVersion.
Refactor installJSSImporter.
Refactor LGJSSImporter.
Refactor JSSImporter.
Updated metadata for renamed files.
Refactor kLGJSSImporterInstalledLabel.
Refactor kLGJSSImporterNotInstalledLabel.
Refactor kLGJSSImporterUpdateAvailableLabel.
Refactor kLGErrorInstallJSSImporter.