Add support for proxy networks & cleanup playbook vars

roles/xremap/tasks/main.yaml

@@ -63,6 +63,7 @@
   get_url:
     url: '{{asset.browser_download_url}}'
     dest: '{{install_dir}}/xremap.zip'
+  environment: '{{proxy_environment}}'
 
 - name: extract release archive
   when: needs_installed