create 4.0.0rc branch


git-svn-id: http://svn.code.sf.net/p/postbooks/code/xtuple/branches/from4_0_0rc@14240 ea1a15ef-c238-0410-93cb-fa28e9f07733
updating branch with backported changes for 18038, 18858, 18900

git-svn-id: http://svn.code.sf.net/p/postbooks/code/xtuple/branches/from4_0_0rc@14262 ea1a15ef-c238-0410-93cb-fa28e9f07733