4/13/2002 - Version 1.0 released

Changes for version 1.2.1
- Added VectorCreator for multiple kinds of indexing schemes
  (iglu.ir.GeneralVectorCreator)
- Speed improvements in FileSearchEngine 
- Added Deletion ability to FileSearchEngine 
- Added Deletion ability to FileBTree
- Added the ability to delete from the FileBTree and FileSearchEngine