[MERGE] merged new api of document module

addons/document/__openerp__.py

addons/document/board_document_view.xml

addons/document/content_index.py

addons/document/directory_content.py

addons/document/document.py

addons/document/document_data.xml

addons/document/document_directory.py

addons/document/document_storage.py

addons/document/document_view.xml

addons/document/nodes.py

addons/document/report/document_report_view.xml

addons/document/test/document_test2.yml

addons/document_ftp/__openerp__.py

addons/document_ftp/ftpserver/abstracted_fs.py

addons/document_ftp/ftpserver/ftpserver.py

addons/document_ftp/test/document_ftp_test2.yml

addons/document_ftp/test/document_ftp_test3.yml

addons/document_ftp/test/document_ftp_test4.yml

addons/document_ftp/test_easyftp.py

addons/document_webdav/dav_fs.py