Preliminary Finnish translation

Fix requirements

add traceback to reveal why errors in the testing framework occurs

setup.py printed out requirements which was just for testing
purposes. It is removed now.

Dependencies are now specified in setup.py. This is good practice
and allows using dynamic specs depending on Django and Python
versions. Thus, requirements.txt can be used for installation
specific requirements. Also, .travis/requirements.txt became
unnecessary and was removed. In addition, .travis.yml became
simpler because version-dependent requirements are already handled
in setup.py, thus it is necessary to only specify Django and Python
versions.

South dependency is specified in setup.py, thus it must be removed
from requirements.txt where it was accidentally added.

Markdown does not support Python 2.6 since version 2.5.0. Thus,
use Markdown<2.5.0 in Travis tests for Python 2.6.

Requirements that are shared for normal installations and Travis
tests are in .travis/requirements.txt. Other requirements are
specified in requirements.txt for normal installations and
.travis.yml for Travis tests.

Fix Travis CI requirements to use django-mptt==0.6.0

django-mptt 0.6.1 is broken, thus force version to 0.6.0 in Travis
CI requirements too. This had been done in normal requirements.txt
already.

Fix Travis-CI URL in README

fix css class name

Change empty markdown config to {} instead of None

Markdown does not accept None as empty configs. See:
https://github.com/waylan/Python-Markdown/issues/357
Thus, the default value for configs keyword argument should be {}
instead of None.

Fixed problem with auth.user in the south migrations for plugin 'images'...

Fixed problem with auth.user in the south migrations. Further continuati...

Fixed problem with auth.user in the south migrations. Further continuation of e506c094.

Python 3 compatibility (or at least correct syntax) for mediawikimport c...

Update installation.rst

Fixed     
`INSTALLED_APPS.append('south')
AttributeError: 'tuple' object has no attribute 'append'
`

Update .travis.yml