* platfotmSpecificHelper methods svn_add_item, svn_remove_item use $(SVN_CLIENT_PATH) instead of plain svn.
* overhual to do_up2s3, loop on relavent revisions instead of exiating folders.
* overhual to do_fix_props, make it less verbose and better messages.
* svn2stage, stage2svn will not use rsync link_dest, because it confuses svn.