Updated changelog for 5.2

CHANGELOG.txt

@@ -1,3 +1,17 @@
+5.2:
+- Made BlockBag use WorldVectors for add(Single)SourcePosition
+- Fixed north face not being set with non-singleblockpatterns.
+- Moved the block data check to LocalWorld, adding preliminary support for custom blocks.
+- Lookup by id if the string passed to Block/ItemType.lookup() is an integer
+- Fixed issues with //replace.
+- Factored lookup code from BlockType and ItemType into a method in StringUtil.
+- BaseBlock changes
+- Properly escape cuipattern
+- Fix handling of empty strings passed to Block/ItemType
+- Improved formatting and performance of YAMLProcessor when no comments are present
+- Added bPermissions support
+- Update for new events system
+
 5.1.1:
  - Fixed some compatibility issues with SpoutPlugin
  - Readded Permissions 2/3 support