add gitignore

Author: kltm

.gitignore

@@ -0,0 +1,27 @@
+## Ignore the npm stuff that we now have.
+node_modules
+
+## Do not commit our TAGS
+TAGS
+
+## Emacs things (from 
+## https://github.com/github/gitignore/blob/master/Global/Emacs.gitignore).
+*~
+\#*\#
+/.emacs.desktop
+/.emacs.desktop.lock
+.elc
+auto-save-list
+tramp
+.\#*
+# Org-mode
+.org-id-locations
+*_archive
+
+.idea
+.env
+
+mirror
+target
+
+datasets.json