update changelog

CHANGELOG.md

@@ -1,4 +1,27 @@
 # Optimizely Android X SDK Changelog
+### 1.4.0-alpha-RC1
+July 26, 2017
+
+- Release candidate for 1.4.0
+
+*Bug Fixes*
+
+- Better javadocs.
+- Cleanup any resource leaks.
+- Better exception handling to avoid any crashes.
+- Fix proguard rules
+- Fix logger issue
+- Allow EventRescheduler to work with wifi change intent filter (you don't have to include that intent filter).
+
+*Breaking Changes*
+
+- Must include intent filter for EventRescheduler and DatafileRescheduler in the application manifest if the developer wants to use them (see the test-app manifest for an example).
+- Pass context into OptimizelyManager.Builder.
+- UserProfileService added.
+- Background processes are not running by default.
+- Various handlers (EventHandler, DatafileHandler, ErrorHandler) can be overridden.
+
+
 ### 1.4.0-alpha
 July 11, 2017