StreamCipher class

and some kf_dict finger-print caching.
refactor some output
More StreamCipher refactor

Move compress and decompress into StreamCipher
re-work secrepo config

Change so secrepo config without args simply provides status.
Add --activate --encrypt --decrypt
fix -g add

and start adding some test-cases for global config
tree filter improvement

optimize logging, comments.
correct usage hint
update docs
Merge remote-tracking branch 'origin/master' into editdocs
fix tree-filter excess output
Merge branch 'editdocs' of github.com:gregorlarson/secrepo into editdocs
Merge remote-tracking branch 'origin/master' into editdocs