Clean up makefile.

Upgrade compiler to fix obscure threading bug when calculating priori…

…ty lists.

Fix the scaling of gantt chart when grouping is none.

Update tests for v0.3.2 file formats.

Upgrade version to v0.7.5

Update copyright year to 2024.

Fix issue with exporting of Gantt Chart when number of activities is …

…low. Correct projection colours in Earned-Value Chart.

Update version number.

Update some packages and add icon to exe.

Add icon to notification dialog. Add Jpeg and Pdf export to OxyPlot c…

…harts.