Add ability to ignore failed installs

install-language-servers.sh

@@ -1,9 +1,15 @@
 #! /bin/bash
-set -e
 
 # Clear explicit PYTHONPATH since this gets confused between py2 and py3
 export PYTHONPATH=""
 
+# Ignore failed installs
+if [ -z "$IGNORE_MISSING" ]; then
+    set -e
+else
+    set +e
+fi
+
 # Determines if a command exists or not
 function command_exist() {
     command -v "$1" > /dev/null 2>&1;