Install pydes automatically

[johnnykv]

Currently pydes has to be installed manually using

$ pip install pydes --allow-external pydes --allow-unverified pydes

This needs to be automated through setup.py, but currenlty there seems to be no way to pass -allow-external pydes --allow-unverified pydes to install_requires.

Relates to #187

[zippy1981]

I'm not a beeswarm issue, but google brought me here while I was trying to install pyDes, and I'm just complaining about the irony of having to install an untrusted crypto module

[dufferzafar]

When I run the command pip install pydes --allow-external pydes --allow-unverified pydes pip (v8.0.2) and it fails with the following error:

DEPRECATION: --allow-external has been deprecated and will be removed in the future. Due to changes in the repository protocol, it no longer has any effect.
DEPRECATION: --allow-unverified has been deprecated and will be removed in the future. Due to changes in the repository protocol, it no longer has any effect.
Collecting pydes
  Could not find a version that satisfies the requirement pydes (from versions: )
No matching distribution found for pydes

For anyone who comes here by googling stuff, I installed pyDes by running: pip install http://twhiteman.netfirms.com/pyDES/pyDes-2.0.1.zip