[MERGE] new v8 api by rco

A squashed merge is required as the conversion of the apiculture branch from
bzr to git was not correctly done. The git history contains irrelevant blobs
and commits. This branch brings a lot of changes and fixes, too many to list
exhaustively.

- New orm api, objects are now used instead of ids
- Environements to encapsulates cr uid context while maintaining backward compatibility
- Field compute attribute is a new object oriented way to define function fields
- Shared browse record cache
- New onchange protocol
- Optional copy flag on fields
- Documentation update
- Dead code cleanup
- Lots of fixes

setup.py

@@ -85,6 +85,7 @@ def py2exe_options():
                         "commands",
                         "dateutil",
                         "decimal",
+                        "decorator",
                         "docutils",
                         "email",
                         "encodings",
@@ -155,6 +156,7 @@ setuptools.setup(
       install_requires = [
           'pychart', # not on pypi, use: pip install http://download.gna.org/pychart/PyChart-1.39.tar.gz
           'babel >= 1.0',
+          'decorator',
           'docutils',
           'feedparser',
           'gdata',