Version bump to 0.2.1
Update changelog for version 0.2.1
Fix #40: throw an error when no scheme is supplied
Enhance command line logging
Fix #48: Plain error message on not found passphrase
Fix #54: Import data store by iterating over it's data
Ref #53: add bool import flags for overwrite,theirs,yours
Fix #54 #53: Implement merging strategies on import