[IMP] convert.py xml <odoo> parsing and cleanups

- deprecate <url> tag
- deprecate multi levels name for <menuitem>
- <odoo> <openerp> <data> tags are now equivalent and may be nested, it means
  that the <data> tag is now optional and should only be used if the same xml
  file contains both update and noupdate records.

Only the base_menu.xml has been converted to the new format as an example.
Other files will be be progressively converted to avoid useless conflicts in
forward ports.
[FIX] leftover of commit 790312dbf92e302f40782a60c5dc208cd6877079wq
[IMP] website_twitter: authentication error popup with proper description based on twitter error codes and responses

[CLEAN] website_twitter: some linting in twitter_config.py file (indentation
errors, imports to remove, spacing issues).
[IMP] membership: usability

- new help tip when there are no members
- allow to search for members and tags
- move reporting to "Reporting" menu
[IMP] web: update jquery to 1.11.1 version
[IMP] web: update jquery.blockui to 2.70.0-2014.11.23 version
[IMP] web: update juqery.ba-bbq to 1.3pre version
[FIX] web: reintroduce $.bbq to keep compatibility with jquery.ba-bbq
[REM] web: jquery.ui.bootstrap
[IMP] web: update jquery.scrollTo to 1.4.14 version
[IMP] web: update jquery.autosize.js to 1.18.15 version
[IMP] web: update jquery.form to 3.51.0-2014.06.20 version
[IMP] web: update jquery-ui to 1.11.2 version
[FIX] web: override jquery-ui ui-state-error css
[FIX] web: fix all the (assets) links!
[FIX] survey: only load js scripts when needed

This is done with the help of website.if_dom_contains and 1) js_surveyform
class for survey.js 2) a new fake class js_surveyresult for survey_result.js
This fix also allow to avoid spurious logs on runbot during phantomjs tests.
[FIX] website_event_sale: tour: complete form after `order now` step

The form was not correctly completed and, for some reasons, phantomjs did
not complain. However, it was not possible to run the test from the browser.

Also, reword all the steps title for a better understanding of the test.
[FIX] tour.js: introduce common properties selector

Since jquery 1.9, attr selector only matches attributes (the behavior was not
consistent before, sometimes it returned the properties [0]) and tour.js was
relying on those inconsistencies. This commit introduce common properties
selector to allow matching properties during a tour.

[0] http://jquery.com/upgrade-guide/1.9/#attr-versus-prop-
[FIX] tour.js: remove synchro between selected property and attribute

This line was previously used to allow attribute selectors to match the
`selected` property, by changing the attribute each time the property
was changed. Now it doesn't make sense since rev c611846 introduced
property selectors + it seems to mess with phantomjs, as the test does
not pass in phantomjs environment but passes ok in a "real" webkit browser.
[FIX] website_sale: shop_buy_product: use properties selector