Removing python-colorama dependency

[grosjo]

Hi
Still on my hunt to reduce the requirements on small devices (openwrt)

If we can't really remove cryptography, can we maybe remove or make optional such fancy things like "colorama" to save space for instance ?

[uzlonewolf]

Colorama is really tiny, but yes, it shouldn't be hard to make it optional. I'll try to do it this weekend.