updating .gitignore with github recommendations for node projects

removing node_modules/* to prevent spurious updates after 'npm install'

.gitignore

@@ -1,2 +1,17 @@
 .sass-cache
 config.js
+lib-cov
+*.seed
+*.log
+*.csv
+*.dat
+*.out
+*.pid
+*.gz
+
+pids
+logs
+results
+
+npm-debug.log
+node_modules