Create new document from dialog.

now each gadget should do translation by itself
for the iframe reason

1. remove catch error in gadget_erp5.js and gadget_translate.js.
2. add acquisition method getTranslationMethod in main gadget.
3. add translaton_look key in configuration to define translation scipt.
4. fix can't save when edit.

1. Use form submit instead of ajax in erp5_gadgetfield.js file
2. Data decode is realized in GadgetFieldValidator
3. Move jio files in erp5_core for activity watcher gadget
4. Update gadgetfield test
   Add test with RelationStringField
   Remove DataURL test which is not necessary

Add IE supported

- make sure only strings are passed to and returned from translation gadget
- make sure to wrap in correct temporary elements (table rows in table, options in select, rest in div)
- make sure forms are present when declareService is called

- add notifyUpdate method to re-render header once translations are available
- add translations to all text elements

- update handlebars template, web sites with translations will have a collapsible language menu.
- add collapsible menu inside listview
- fix missing form element on panel searchfield
- add handler to retrieve available languages when creating template
- add translations for all text elements used
- update declareService to handle multiple forms (close panel, searchfield, languages)

- add uritemplate
- add getTranslationDict method to retrieve a language dictionary from ERP5
- add fetchLanguage to handle browser working with "en-EN" vs gadget/ERP5 only using "en"
- add ready handler to retrieve languages from web_site_module and translation method from custom
initialization gadget (temp fix) to remove hardcoded configuration parameters
- add error handler to catch missing translation method and not translate/expose language options to
ensure compat with existing rJS web sites
- add ready handler to initialize plugin and re-render header once translations are available
- add method to expose available languages, so they can be fetched from the panel gadget
- fix translation methods to only work with strings being passed in and out

- switch gadget declarations in html (translate needs jio_ajax, must be available before header/panel)
- add translation method bridge
- add notifyUpdate to re-render header once translations are available
- add getSiteRoot to return root url, so translation gadget can fetch languages declared on website
- add error handlers to make sure existing rjs websites don't break