Use oslo.config to load crypto plugins
Don't inject conf into extension manager.
Merge pull request #65 from dmend/master

Use oslo.config to load crypto plugins
Release for v0.1.46
Prepare for next release
Fixed PEP8 violations; Tweaked fake encrypt/decrypt to show original passed in data;
Added soft-delete orders/secrets support; Updated unit tests;
Merge remote-tracking branch 'upstream/master'