project status update
Fix bug due to typo.

* Bug found by: harrymmmm
* Fix proposed by: freamon
Bump patch version.
Merge pull request #734 from Renelvon/hotfix_1

Hotfix 1. Fix #728
Merge branch 'master' into hotfix_1_backmerge
Merge pull request #746 from Renelvon/hotfix_1_backmerge

Hotfix 1 and project version backmerge
Flag implicit relative imports (W0403).
State relative imports explicitly.

* Reorder imports in accordance to PEP8.
* Replace calls to privtopub with calls to
  privkey_to_pubkey for consistency.