Add rhizome export commands that don't try to decrypt file contents

export [bundle/manifest/file]
extract [bundle/file]

"dump file" has been replaced with "export file".
Add uint64_scaled_to_str() function in str.c
Add keyring test for implicitly created identity
Ensure a randomly generated phone number is valid, Fixes #55
Merge branch 'naf2-logging' into 'development'