Add experimental windows installer

This nsis script should create a windows installer.
Although the installer worked for the first tests
you should handle it with care and consider it
highly experimental

windows-installer/README.md

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+# Dino Windows Installer
+
+## Requirements
+
+To create the Dino windows installer you need this:
+* nsis (e.g. `apt install nsis` on Debian)
+* Dino compiled for windows in input directory
+* logo.ico in input directory
+	* Download https://dino.im/img/logo.svg
+	* Convert it to ico (e.g. `onvert -background transparent -define 'icon:auto-resize=16,24,32,64' logo.svg logo.ico` (requires imagemagick)
+
+## Create installer
+
+Simply run `makensis dino.nsi`

windows-installer/dino.nsi

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+Unicode True
+
+!define MUI_PRODUCT "Dino"
+!define MUI_PRODUCT_NAME ${MUI_PRODUCT}
+!define PRODUCT_WEBSITE "https://dino.im"
+!define MUI_ICON "input/logo.ico"
+!define ICON "input/logo.ico"
+
+# define installer name
+OutFile "dino-installer.exe"
+
+BrandingText "Dino - Communication happyness"
+ 
+# set install directory
+InstallDir $PROGRAMFILES64\dino
+ 
+# default section start
+Section
+ 
+# Install binary and DLLs
+SetOutPath $INSTDIR\bin
+File input/*.dll input/dino.exe
+
+# Install the libs and shared files 
+SetOutPath $INSTDIR
+File /r /x dino.exe /x plugins /x ./*.dll input/*
+
+# Install the plugins
+SetOutPath $INSTDIR\lib\dino\plugins
+File input/plugins/*
+ 
+# define uninstaller name
+WriteUninstaller $INSTDIR\uninstaller.exe
+ 
+# Create a shortcut for startmenu
+CreateShortcut "$SMPROGRAMS\dino.lnk" "$INSTDIR\bin\dino.exe" "" "$INSTDIR\logo.ico"
+
+# default section end
+SectionEnd
+ 
+# Uninsaller section
+Section "Uninstall"
+ 
+# Always delete uninstaller first
+Delete $INSTDIR\uninstaller.exe
+ 
+# now delete installed file
+Delete $INSTDIR\*
+
+# Delete the directory
+RMDir /r $INSTDIR
+SectionEnd