Merge branch 'formatting' into formatting_python2.3

Conflicts:
	uncertainties/__init__.py
	uncertainties/test_uncertainties.py
	uncertainties/unumpy/core.py
Adapted for Python < 2.5.
Adapted to Python < 2.5.
Adapted to Python < 2.5.
Adapted to Python < 2.5.
Adapted to Python < 2.5.
Adapted to Python < 2.5.
Adapted to Python < 2.5.
Adapted to Python < 2.5.
Fixed obsolete name.
All tests pass with Python 2.4.
Merge branch 'formatting' into formatting_python2.3

Conflicts:
	uncertainties/__init__.py
	uncertainties/test_uncertainties.py
	uncertainties/umath.py
	uncertainties/unumpy/core.py
All tests pass with Python 2.4.
Merge branch 'formatting' into formatting_python2.3

Conflicts:
	uncertainties/__init__.py
	uncertainties/unumpy/core.py
Fixed obsolete name.
Merge branch 'formatting_python2.3' into master_python2.3
Merge branch 'master' into master_python2.3
Merge branch 'master' into master_python2.3
Merge branch 'master' into master_python2.3
Merge branch 'master' into master_python2.3