update change log for new breaking change version 1.7.0 for support o… (#128)

* update change log for new breaking change version 1.7.0 for support of android sdk 1.4.0 breaking changes.

* update changelog to mention other commits since 2.0.0-alpha

* remove live variable change.  it won't be included on release branch

Author: thomaszurkan-optimizely

CHANGELOG.md

@@ -1,4 +1,20 @@
-## 2.0.0
+# Optimizely Java X SDK Changelog
+## 1.7.0
+
+July 12, 2017
+
+This release will support Android SDK release 1.4.0
+
+### New Features
+
+- Added `UserProfileService` interface to allow for sticky bucketing
+
+### Breaking Changes
+
+- Removed `UserProfile` interface. Replaced with `UserProfileService` interface.
+- Removed support for v1 datafiles.
+
+## 2.0.0-alpha
 
 May 19, 2017
 
@@ -110,4 +126,4 @@ August 29, 2016
 
 July 26, 2016
 
-- Beta release of the Java SDK for server-side testing
+- Beta release of the Java SDK for server-side testing