Move legacy documentation(s) to project/branches to avoid any missunderstandings about the actual source to use and also cleanup the project tree (JAMES-1335)

git-svn-id: https://svn.apache.org/repos/asf/james/project/branches/server_docs_3-alpha_and_2.2.0@1195182 13f79535-47bb-0310-9956-ffa450edef68
tree: 2fc5601ae6f567324fa3ff8324e099d4edc49c47
  1. 2.2.0/
  2. src/
  3. pom.xml