*Removed spaces and tabs from empty lines. This should also fix trailing whitespaces/tabs.
*Added /cdl_talk/template.html missing </head>.
*Whitespaces to tabs and also fixed indentation.
*from __future_ import print_function to fix print function compatibility between 2.x and 3.x.
*Typo fix at QuestionEditorWidget.py line 143.
Merge pull request #26 from Therzok/cdl

Fix to issue #25
(mainly removed white spaces and fixed indentation)