version 0.3.0 is out now 
Of course, you are encouraged to play with it as much as you like and give me some feedback. All issues, PRs, improvements are welcomed.
New features
- Render a full duplicate-free list of all the included references at the bottom of the note viewer in APA format
- Parse and store references on startup (and show an alert if the provided data is not valid or the file doesn't exist)
- Render inline (part of a larger paragraph) and block-level (standalone) references.
Bug fixes
- Focus on the search field right after opening the citation popup
- Display reference citekey instead of "author+publication year" combination