added a script to install nvim

install_nvim.sh

@@ -0,0 +1,23 @@
+#!/bin/bash
+
+installdir="$HOME/.local/bin"
+echo "install directory is $installdir"
+
+if [ ! -d $installdir ]; then
+    echo "install directory does not exist, creating it"
+    mkdir -p $installdir || (echo "failed to create install directory" ; exit 1)
+fi
+
+cd $installdir
+
+echo "downloading appimage..."
+wget https://github.com/neovim/neovim/releases/download/nightly/nvim.appimage || (echo "failed to download appimage"; exit 1)
+echo "done."
+chmod +x nvim.appimage
+
+echo "The neovim appimage has been downloaded into $installdir."
+echo "It has been marked as executable, you can now run $installdir/nvim.appimage."
+echo "You should add an alias into your shrc:"
+echo "    alias vim=\"$installdir/nvim.appimage\""
+echo "or"
+echo "    alias nvim=\"$installdir/nvim.appimage\""