Moving BSF over to Commons

git-svn-id: https://svn.apache.org/repos/asf/commons/proper/bsf/branches/bsf3-old@1158503 13f79535-47bb-0310-9956-ffa450edef68
tree: edf6769d7ba8ab030fc967e6ae9186d5cf7657a1
  1. build.xml
  2. src/
  3. tests/