Move installer related stuff into admin/win/nsi.

admin/win/nsi/nsis_uac/UAC_Uninstaller.nsi

@@ -0,0 +1,49 @@
+/*
+This script was made in response to http://forums.winamp.com/showthread.php?threadid=280330
+It is a ugly hack and is mostly here just to have a solution right now.
+Hopefully, NSIS will add support for changing the RequestExecutionLevel of the uninstaller
+This code inspired the _UAC.GenerateUninstallerTango macro (called by ${UAC.U.Elevate.AdminOnly} unless you define UAC_DISABLEUNINSTALLERTANGO)
+*/
+
+RequestExecutionLevel user /* RequestExecutionLevel REQUIRED! */
+!define APPNAME "UAC_Uninstaller"
+Name "${APPNAME}"
+OutFile "${APPNAME}.exe"
+ShowInstDetails show
+!include LogicLib.nsh
+
+!define UNINSTALLER_UACDATA "uac.ini"
+!define UNINSTALLER_NAME "Uninstall FooBarBaz"
+
+Function un.onInit
+ReadIniStr $0 "$ExeDir\${UNINSTALLER_UACDATA}" UAC "Un.First"
+${IF} $0 != 1
+	;SetSilent silent
+	InitPluginsDir
+	WriteIniStr "$PluginsDir\${UNINSTALLER_UACDATA}" UAC "Un.First" 1
+	CopyFiles /SILENT "$EXEPATH" "$PluginsDir\${UNINSTALLER_NAME}.exe"
+	StrCpy $0 ""
+	${IfThen} ${Silent} ${|} StrCpy $0 "/S " ${|}
+	ExecWait '"$PluginsDir\${UNINSTALLER_NAME}.exe" $0/NCRC _?=$INSTDIR' $0
+	SetErrorLevel $0
+	Quit
+	${EndIf}
+
+# UAC code goes here ...
+FunctionEnd
+
+Section
+WriteUninstaller "$exedir\${UNINSTALLER_NAME}.exe"
+SetAutoClose true
+DetailPrint "Uninstalling..."
+Sleep 1111
+Exec '"$exedir\${UNINSTALLER_NAME}.exe"'
+SectionEnd
+
+Section uninstall
+MessageBox mb_ok "My filename is: $EXEFILE"
+Delete "$instdir\${UNINSTALLER_NAME}.exe"
+Delete "$instdir\${APPNAME}.exe" ;delete generated installer aswell, this is just a sample script
+SectionEnd
+
+page InstFiles