0.1.0

- [X] Create backlog
- [X] Update version
- [X] Fix default binding in org2jekyll-mode
- [X] Make the publish! action asynchronous [2/2]
  - [X] Close not-needed interactive command and make them function
  - [X] Render asynchronous the main org2jekyll/publish! command
- [X] Add checks on header and explain what's missing if problems.