Bugfix: Non ascii-chars in user name

[kjona]

First and last names of users were treated as non-unicode strings. This lead the application to stop working (decode error) if a user with non-ascii name saved a question.
I added two characters to fix this problem - declaring strings as unicode were the user lastname/firstname are read.

PS: Sorry for two separate commits - its the first time I use github ;-)
PPS: Thank you for your work. I really like it.

[bryanhelmig]

Wonderful, thanks @kjona! I've merged this in. You may add yourself to the authors/contributors list as well if you like. I'll gladly pull that in.

[kjona]

Thank you for your quick response and the invitation to the contributors list. However, the changes are only two characters - I'll join the list with the next improvement :-)