merge

[win32] defer import of logilab.common.daemon The module is not importable on windows, and etwist.service carefully avoids importing it (but imports etwist.server). Wait until we are sure not to be on windows to do the import)

[ajax] refactor/cleanup low-level ajax functions * loadxhtml/replacePageChunck/reload_component/reload_box deprecated in favor of loadXHTML / ajaxFuncArgs * some other cleanups in cubicweb.ajax.js * add js_render which will replace js_component (more generic, nicer argument passing handling)