Merge pull request #21 from kouk/gitignore

Add a .gitignore to ignore a few common build artifacts.
diff --git a/.gitignore b/.gitignore
new file mode 100644
index 0000000..867434b
--- /dev/null
+++ b/.gitignore
@@ -0,0 +1,3 @@
+build
+dist
+*.egg-info
\ No newline at end of file