Expand changelog for 1.2.0 release
+## 1.2.0 (2018-01-04)
+
+### Improvements
+
+- Releases are more responsive, because dry runs are now done without triggering a sync [weaveworks/flux#862](https://github.com/weaveworks/flux/pull/862)
+- Syncs are much faster, because they are now done all-in-one rather than calling kubectl for each resource [weaveworks/flux#872](https://github.com/weaveworks/flux/pull/872)
+- Rewrite of the image registry package to solve several problems [weaveworks/flux#851](https://github.com/weaveworks/flux/pull/851)
+
+### Fixes
+
+- Support signed manifests (from GCR in particular) [weaveworks/flux#838](https://github.com/weaveworks/flux/issues/838)
+- Support CronJobs from Kubernetes API version `batch/v1beta1`, which are present in Kubernetes 1.7 (while those from `batch/b2alpha1` are not) [weaveworks/flux#868](https://github.com/weaveworks/flux/issues/868)
+- Expand the GCR credentials support to `*.gcr.io` [weaveworks/flux#882](https://github.com/weaveworks/flux/pull/882)
+- Check that the synced git repo is writable before syncing, which avoids a number of indirect failures [weaveworks/flux#865](https://github.com/weaveworks/flux/pull/865)
+- and, [lots of other things](https://github.com/weaveworks/flux/pulls?q=is%3Apr+closed%3A%3E2017-11-01)
+
## 1.1.0 (2017-11-01)
### Improvements
