refactor login box & form to enable easy pluggability * vregistry.selectable: get all selectable object of fixed oid with given context * template headeri, logbox, logform: reorganize a bit the structure

\.svn
^build$
^dist$
\.pyc$
\.pyo$
\.bak$
\.old$
\~$
\#.*?\#$
\.swp$
^doc/book/en/apidoc$