Update CHANGELOG for 0.5.0

Author: Trent Willis

CHANGELOG.md

@@ -0,0 +1,14 @@
+0.5.0 / 2017-05-01
+==================
+
+  * Implements rule to catch sendAction calls
+  * Clean up text, scope initOverride
+  * Add new rule: no-broken-super-chain
+  * Fix typo: mutliple -> multiple
+  * Fix typo: incuring -> incurring
+  * Fix typo: recieve -> receive
+  * Update README.md
+  * Add a message explaining how to fix computed properties with no dependent keys.
+  * infromation => information
+  * Update package.json; set repository field for npm
+  * Fix incorrect installation instruction