Add gitignore contents to npmignore

Apparently, gitignore is only used when there is no npmignore config,
but when there is one, it is overridden, and the gitignored files are
published to npm. m(

Author: raucao

.npmignore

@@ -1,3 +1,15 @@
+*~
+\#*
+.#*
+*.swp
+*.log
+/build
+/gitno
+node_modules
+doc/code
+doc/_build
+doc/__pycache__/
+tags
 .browserslistrc
 .codeclimate.yml
 esformatter-config.json