[README.md] update installer links for v0.7.1

[CHANGELOG.md] v0.7.0

bump Win installer spec to v0.6.1

[CHANGELOG.md] v0.6.0

[CHANGELOG.md] v0.5.1

add fonttools dep bump

[setup.py] minor description revision

[MAINTAINER.md] add the full .iss Inno Setup config file path

[__main__] fmt