Update PECE changelog.

CHANGELOG_PECE.txt

@@ -1,3 +1,22 @@
+* PECE v1.10 (05/20/2018)
+
+- Add Annotation title and permissions
+- Minor fixes on maintenance page UI
+- Enable adding Annotations to PECE Essay's board
+- Add Site Notice feature
+
+* PECE v1.9 (05/10/2018)
+
+- Updated distro dependencies.
+- Fixed contributor assignment on content update.
+- Fixed Essay panes settings form.
+- Added group audience management page
+- Added Annotation features on PECE Essay
+- Updated permissions for group admin.
+- Removed creators/authors field of Memo and Photo Essay
+- Added WYSIWYG on User's Bio and Critical Commentary fields.
+- Added PECE Essay contents on Group's Essay tab
+
 * PECE v1.8 (04/29/2018)
 
 - Fix security issues (remote code execution). See SA-CORE-2018-004