steempy should ignore old depencencies

[clayop]

Version of Python you are running

3.5.2

Version of steem-python you are running

1.0.1

Expected Behavior

After upgrade from older steem-python, steempy should use script 0.8.x

Actual Behavior

steempy gave error like scrypt>=0.8.0 is needed

Steps to reproduce

Place both script 0.7.x version and 0.8.x version in the dist-package directory. Then run steempy

Stack Trace