removed the side effects from crypt.py

Method named get~,  it should not involving side effects.
remove unused imports
Add base for decanter-admin file
Fix pep8
Merge pull request #41 from narusemotoki/develop

removed the side effects from crypt.py
Merge crypt fixes
Merge pull request #42 from hermanschaaf/master

Add utility file for starting decanter projects from the command line