Cannot print unicode characters, for example: degree symbol °

```
What steps will reproduce the problem?
1. Assign a Unicode character
2. Insert it into a PrettyTable
3. Try to print it

What is the expected output? What do you see instead?
I expect degree symbol "°" to print, but instead it prints "°".

What version of the product are you using? On what operating system?
Using PrettyTables v0.7.2 on Python 2.7 using PyScripter.

Please provide any additional information below.
Try the following code and you will see:
from prettytable import PrettyTable
deg= u'\N{DEGREE SIGN}'
print "degree symbol goes here normally:" , deg
x = PrettyTable(["Title"])
x.add_row([deg])
print x

```

Original issue reported on code.google.com by `cargocr...@gmail.com` on 23 Oct 2014 at 8:53

Start by running the provided Python 2.7 reproduction with PrettyTable and trace how the Unicode value moves through PrettyTable before printing. Done means the degree symbol is rendered as ° rather than ° in the table output.

Written by the indexing model from the issue text.