Vigenere Dictionary Attack

This is a tool that uses a combination between a brute force and dictionary attack on a Vigenere cipher.

At present, keys are generated using brute force (will soon try passwords generated from a dictionary first).
Each key is then used to decode the encoded message input. The output is analysed and then put into a ranking table. Outputs will be ranked on a variety of factors (at present, only number of dictionary words in output are counted).

For the future:
Better key generation, trying combinations of dictionary words with numbers. If that fails, brute force will be used.
For all attempts of the dictionary attack, only keys within the known key length range will be generated.
Better ranking system and analysis of possible decoded messages.

Note:
The version currently released, I made in an evening! It is nowhere near ready for release but is a fun project to think about and I need more ideas for improvements mentioned above.

Discuss possible solutions and ideas!