How to build EMF Refactor:
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1. Run build_1_features.xml with ANT in the workspace. (Run AS -> ANT Build.. -> JRE -> Run in the same JRE as the workspace.)
   Important: Wait until PDE-Build in the lower right corner of eclipse is finished.
2. Run build_2_updatesite.xml with ANT in the workspace. 
3. Run build_3_website.xml with ANT in the workspace. 
4. Run clean.xml with ANT in the workspace.