0.5:
* non-exportable signatures (--local) support
* simplify the monkeysign-scan UI
* rename monkeysign-scan to msign and monkeysign-cli to msign-cli to
avoid tab-completion conflict with monkeysphere executables, at the
request of Monkeysphere developers
* usability: make sure arguments are case-insensitive
* fix email format so it's actually readable