[Merge] lp:~lukas-kde/qtubuntu/ubuntuIconsFonts into lp:qtubuntu

[Daniel d'Andrada]

Review: Needs Fixing

"""
private:
    QFont systemFont, fixedFont;
"""

Should follow the project's naming convention for member variables. Eg:
s/systemFont/mSystemFont
-- 
https://code.launchpad.net/~lukas-kde/qtubuntu/ubuntuIconsFonts/+merge/321178
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