v0.4.0

adds

• users can run feature extraction via the edit menu
• users can view (numeric) feature extraction results on the features page
• a status bar in the bottom-left corner describes what the tool is currently doing
• auto-qc failures are highlighted in red

fixes

• qc tags are now displayed correctly
• auto qc results are now displayed as "passed" and "failed" vs. "True" and "False"