Removed code for Python < 2.5.
Merge branch 'master' into master_python2.3: keeping the Python < 2.5 specific code.
Better variable name: what was the "format specification type" is more correctly the "presentation type", now (as per the documentation: https://docs.python.org/2.7/library/string.html#format-specification-mini-language).
More explicit docstring.
"format type" or "format specification type" -> "presentation type", as per the documentation (https://docs.python.org/2.7/library/string.html#format-specification-mini-language).
More consistent punctuation.
More "minimal" code: no need to convert, say, NumPy matrix objects to array objects.
Merge branch 'master' into master_python2.3

Conflicts:
	uncertainties/__init__.py
Put original NumPy doc in unumpy.matrix.getI. Removed obsolete comment.
Reverted to the simple, original docstring for unumpy.matrix.getI (rarely used anyway, I guess).
Merge branch 'master' into master_python2.3

Conflicts:
	uncertainties/unumpy/core.py