added changelog for v1.2.0

CHANGELOG.md

@@ -1,4 +1,16 @@
 # Changelog
+
+## Version 1.2.0
+The *"annotation release"*
+
+### Added
+* paragraph annotations *(now can set HTML ids and classes with `{.someClass, #someId}` syntax)*
+* unit tests for annotation
+* unit for headings *(`h1` to `h5`)*
+
+### Removed
+* Testing code in `index.php`
+
 ## Version 1.1.2
 No major changes introduced, getting ready for release