Added changelog for beta release (#136)

Jacob Wenger · Robert-Jan Huijsman · commit 2fbc725bfb32 · 2017-03-08T14:33:39.000-08:00
diff --git a/changelog.txt b/changelog.txt
@@ -0,0 +1 @@
+feature - Beta release of the Firebase SDK for Cloud Functions.

Original file line number	Diff line number	Diff line change
`@@ -0,0 +1 @@`
	`1`	`+feature - Beta release of the Firebase SDK for Cloud Functions.`