Release 3.0.5

Bump version, changelog for minor htop-3.0.1 release

Merge branch 'bertwesarg-affinity-fix-panel-width'

Update changelog with Berts latest addition

Generate an appropriate shebang line for MakeHeader script

Use configure.ac to handle platform differences where some
build hosts have only a python3, or only python, binary.

Related to htop-dev#6