Change Preference accessor to use category property. Build accessor from accessor holder accessors and not from properties.

Conflicts:
	product/ERP5Form/tests/testPreferences.py

python 2.7.9 validates certificates by default.

1: Resize gadget if it's declared in  iframe
2: Add getContent test

This action just associates all transactions that are not reconciled and there is no such thing as "initial banking reconciliation"

This is for now an had-hoc working implementation.

In order to make it more maintainable, it will probably be required to handle attachment's mime type correctly in the JS.

Ensure only jIO API is used.
Allow to access all ERP5 functionnality with getAttachment.
Improve IE support.

This the default way to authenticate in ERP5. Without this,
it is DANGEROUS to activate another plugin.

The PluggableAuthenticationService lists all activated plugin
and if at least one is available then it deactivate the default
way to authenticate. And if you are not able to pass the activated
plugin then you cannot login anymore.

To prevent this, we can activate a plugin which uses the default
way to authenticate (Dumb HTTP Extraction Plugin), and THEN activate
another plugin.

- update form positioning CSS
- add inset tag-list CSS
- update + fix theming for buttons