Add Lombok 0.2.3. DO NOT MERGE.

This includes three fixes:
- Update the ECJ converter from 4.2.2 to 4.4.
- Properly set the native node reference for variable
- Add post-traversal visitor methods
These are included in this pull request for lombok.ast:

(cherry picked from commit 73d6c86909bcbdbd5725cb30d895d4141cce6da6)

(cherry picked from commit eb9da7b12314957ffec0ba8a3fb255e4c4674146)

Change-Id: Ie610d1343c4db81262391b39443c4b8287da86b5
13 files changed