Few fixes to make the code work in different environment with Python 2.6

[mdebbar]

• Use django's SortedDict instead of collections.OrderedDict.
• In settings, make TEMPLATE_DIRS absolute paths.

[assem-ch]

what the difference between django SortedDict and collections.OrderedDict?

[mdebbar]

collections.OrderedDict didn't work in the server, so I think it doesn't exist in Python2.6. In terms of implementation, they are the same.

[mdebbar]

Python docs say that OrderedDict was introduced in Python 2.7: http://docs.python.org/2/library/collections.html#collections.OrderedDict