erp5_trade: enable template creation for purchase order
erp5_web_renderjs_ui: add compatibility with other bt5 by calling same method names
Use FileValidator to post element's value  with key
Modifie test files and gadgetfield js with the new formulator GadgetField

Use field key instead of field id
Change doctype html4 to html5
Add library js file in ignore file list
erp5_web_renderjs_ui_test: created new business template to test renderJS UI
Rebase html5 branch with new GadgetField
Add XHTML test only configure

Do not merge in Master
Add html file test