Update 'rafael' branch to use new changes on unit tests and check that the last merge did not add random failures on functional tests

Add generic InteractionGadget implementation.

Use of meta types is deprecated. Ignoring them makes it possible to optimize
getTypeBasedMethod thanks to portal types as classes.

- New readOnlyTransactionCache context manager replacing
  enableReadOnlyTransactionCache and disableReadOnlyTransactionCache
- Drop compatibility code that tolerate a dummy context to be passed to
  getReadOnlyTransactionCache and getTransactionalVariable.

Catch "ready" event and call form update.

This way many handlers can bind to it (use idea of document.ready in DOM world).

This reverts commit ddcb5001.

This commit itself is good. But some more work is needed to
check failures that were hidden

set as expected failure because to make it works is needed add one extension to run this tests and it is not included.
The extension is: http://git.erp5.org/gitweb/erp5.git/blob/HEAD:/bt5/erp5_dhtml_style/SkinTemplateItem/portal_skins/erp5_dhtml_style/erp5_dhtml_style.js.xml?js=1.

In poppler 0.18+, pdftohtml generates " " instead of " ", so
make sure both are accepted.

_getOb() is too low level and is no longer called by Zope during traversal (which uses
__getitem__()), if the object is not an explicity subobject.

__getitem__() is the right interface for a folder to pretend to have objects it
doesn't actually have.

same as bcc12a28 (use getattr to be compatible with newer zope version).

since Zope 2.12.23, ObjectManager's get and __getitem__ returns only 'items' (no attributes / methods from the class or from acquisition).

since Zope 2.12.23, ObjectManager's get and __getitem__ returns only 'items' (no attributes / methods from the class or from acquisition).