Add .gitignore

Author: ryanjbaxter

.gitignore

@@ -0,0 +1,29 @@
+*~
+#*
+*#
+.#*
+.classpath
+.project
+.settings
+.springBeans
+.gradle
+build
+bin
+target/
+asciidoctor.css
+_site/
+*.swp
+.idea
+*.iml
+.factorypath
+.vscode/
+.flattened-pom.xml
+.DS_Store
+node_modules
+node
+_configprops.adoc
+_spans.adoc
+_metrics.adoc
+_conventions.adoc
+/package.json
+package-lock.json