Aflak

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New:

- Add 3 types of ROI: polygonal, ecliptic and semi-automatic. In semi-automatic
mode, the use is free to choose and point and a threshold. All the points
above the threshold around the selected point will be inside the ROI.
- Add a "Recent Files" menu. No need to look far away for your FITS files.

Change:

- Delete ROI button and move ROI management inside menu.

Fix:

- Output of --version under some some circumstances (fa7e211)
- Name of main window is set to 'aflak' (6677775)

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New:

- FITS menu from which FITS header can be seen
- Version flag to CLI
- `About' dialog box in Help menu

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Fix: Run aflak as module (with `python -m aflak`)

New:

- Include some unit tests
- Include units in waveform axes, read from loaded FITS files

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Fix: Use logarithmic scale on brightness histograms

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Very first version released on PyPI. Can only open FITS files and visualize
FLUX and WAVE data.