added CHANGELOG.md (#7)

Author: roblarsen

CHANGELOG.md

@@ -0,0 +1,8 @@
+### Changelog
+
+### 1.0.0 (October 8, 2018)
+
+- Break main.css into multiple files, implements build [`ddd8e50`](https://github.com/h5bp/main.css/commit/ddd8e50c1b80a108a0552b359c1e717dad484d3b) [`13c6fd5`](https://github.com/h5bp/main.css/commit/13c6fd562949e63959c1e5a30957473e0806dad4)
+- Added travis.yml [`88b4250`](https://github.com/h5bp/main.css/commit/88b42503c0f223103a090854603816f8dbd84367)
+- Added .github folder [`#2`](https://github.com/h5bp/main.css/pull/2)
+- Added .editorconfig [`#1`](https://github.com/h5bp/main.css/pull/1)