Add requests to prerequisites list

[ghost]

# python mineCharDetails.py
Traceback (most recent call last):
  File "mineCharDetails.py", line 7, in <module>
    from Charachters import CharachterPage
  File "/Users/dmitriinechaev/01-personal/MD/TUM/2015-wintersemester/JSSeminar/awoiaf/scr/lib/Charachters.py", line 1, in <module>
    import requests
ImportError: No module named requests

Installing requests module resolves this issue:

# pip install requests