Add installer

installer/install-omnisharp-node-client.sh

@@ -0,0 +1,20 @@
+#!/bin/bash
+
+set -e
+
+cd $(dirname $0)
+[ -d ../servers/omnisharp-node-client ] && rm -rf ../servers/omnisharp-node-client
+mkdir ../servers/omnisharp-node-client
+cd ../servers/omnisharp-node-client
+git clone https://github.com/OmniSharp/omnisharp-node-client .
+npm install
+npm build
+
+cat <<EOF > omnisharp-node-client
+#!/bin/sh
+
+DIR=\$(cd \$(dirname \$0); pwd)
+node \$DIR/languageserver/server.js
+EOF
+
+chmod +x omnisharp-node-client